1 /*
2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoaderExt.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/modules.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "interpreter/bytecodeStream.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "jvmtifiles/jvmtiEnv.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "memory/resourceArea.hpp"
38 #include "memory/universe.hpp"
39 #include "oops/instanceKlass.hpp"
40 #include "oops/objArrayOop.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jniCheck.hpp"
43 #include "prims/jvm_misc.hpp"
44 #include "prims/jvmtiAgentThread.hpp"
45 #include "prims/jvmtiClassFileReconstituter.hpp"
46 #include "prims/jvmtiCodeBlobEvents.hpp"
47 #include "prims/jvmtiExtensions.hpp"
48 #include "prims/jvmtiGetLoadedClasses.hpp"
49 #include "prims/jvmtiImpl.hpp"
50 #include "prims/jvmtiManageCapabilities.hpp"
51 #include "prims/jvmtiRawMonitor.hpp"
52 #include "prims/jvmtiRedefineClasses.hpp"
53 #include "prims/jvmtiTagMap.hpp"
54 #include "prims/jvmtiThreadState.inline.hpp"
55 #include "prims/jvmtiUtil.hpp"
56 #include "runtime/arguments.hpp"
57 #include "runtime/deoptimization.hpp"
58 #include "runtime/fieldDescriptor.inline.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/interfaceSupport.inline.hpp"
61 #include "runtime/javaCalls.hpp"
62 #include "runtime/jfieldIDWorkaround.hpp"
63 #include "runtime/jniHandles.inline.hpp"
64 #include "runtime/objectMonitor.inline.hpp"
65 #include "runtime/osThread.hpp"
66 #include "runtime/reflectionUtils.hpp"
67 #include "runtime/signature.hpp"
68 #include "runtime/thread.inline.hpp"
69 #include "runtime/threadHeapSampler.hpp"
70 #include "runtime/threadSMR.hpp"
71 #include "runtime/timerTrace.hpp"
72 #include "runtime/vframe.inline.hpp"
73 #include "runtime/vmThread.hpp"
74 #include "services/threadService.hpp"
75 #include "utilities/exceptions.hpp"
76 #include "utilities/preserveException.hpp"
77 #include "utilities/utf8.hpp"
78
79
80 #define FIXLATER 0 // REMOVE this when completed.
81
82 // FIXLATER: hook into JvmtiTrace
83 #define TraceJVMTICalls false
84
85 JvmtiEnv::JvmtiEnv(jint version) : JvmtiEnvBase(version) {
86 }
87
88 JvmtiEnv::~JvmtiEnv() {
89 }
90
91 JvmtiEnv*
92 JvmtiEnv::create_a_jvmti(jint version) {
93 return new JvmtiEnv(version);
94 }
95
96 // VM operation class to copy jni function table at safepoint.
97 // More than one java threads or jvmti agents may be reading/
98 // modifying jni function tables. To reduce the risk of bad
99 // interaction b/w these threads it is copied at safepoint.
100 class VM_JNIFunctionTableCopier : public VM_Operation {
101 private:
102 const struct JNINativeInterface_ *_function_table;
103 public:
104 VM_JNIFunctionTableCopier(const struct JNINativeInterface_ *func_tbl) {
105 _function_table = func_tbl;
106 };
107
108 VMOp_Type type() const { return VMOp_JNIFunctionTableCopier; }
109 void doit() {
110 copy_jni_function_table(_function_table);
111 };
112 };
113
114 //
115 // Do not change the "prefix" marker below, everything above it is copied
116 // unchanged into the filled stub, everything below is controlled by the
117 // stub filler (only method bodies are carried forward, and then only for
118 // functionality still in the spec).
119 //
120 // end file prefix
121
122 //
123 // Memory Management functions
124 //
125
126 // mem_ptr - pre-checked for NULL
127 jvmtiError
128 JvmtiEnv::Allocate(jlong size, unsigned char** mem_ptr) {
129 return allocate(size, mem_ptr);
130 } /* end Allocate */
131
132
133 // mem - NULL is a valid value, must be checked
134 jvmtiError
135 JvmtiEnv::Deallocate(unsigned char* mem) {
136 return deallocate(mem);
137 } /* end Deallocate */
138
139 // Threads_lock NOT held, java_thread not protected by lock
140 // java_thread - pre-checked
141 // data - NULL is a valid value, must be checked
142 jvmtiError
143 JvmtiEnv::SetThreadLocalStorage(JavaThread* java_thread, const void* data) {
144 JvmtiThreadState* state = java_thread->jvmti_thread_state();
145 if (state == NULL) {
146 if (data == NULL) {
147 // leaving state unset same as data set to NULL
148 return JVMTI_ERROR_NONE;
149 }
150 // otherwise, create the state
151 state = JvmtiThreadState::state_for(java_thread);
152 if (state == NULL) {
153 return JVMTI_ERROR_THREAD_NOT_ALIVE;
154 }
155 }
156 state->env_thread_state(this)->set_agent_thread_local_storage_data((void*)data);
157 return JVMTI_ERROR_NONE;
158 } /* end SetThreadLocalStorage */
159
160
161 // Threads_lock NOT held
162 // thread - NOT pre-checked
163 // data_ptr - pre-checked for NULL
164 jvmtiError
165 JvmtiEnv::GetThreadLocalStorage(jthread thread, void** data_ptr) {
166 JavaThread* current_thread = JavaThread::current();
167 if (thread == NULL) {
168 JvmtiThreadState* state = current_thread->jvmti_thread_state();
169 *data_ptr = (state == NULL) ? NULL :
170 state->env_thread_state(this)->get_agent_thread_local_storage_data();
171 } else {
172 // jvmti_GetThreadLocalStorage is "in native" and doesn't transition
173 // the thread to _thread_in_vm. However, when the TLS for a thread
174 // other than the current thread is required we need to transition
175 // from native so as to resolve the jthread.
176
177 ThreadInVMfromNative __tiv(current_thread);
178 VM_ENTRY_BASE(jvmtiError, JvmtiEnv::GetThreadLocalStorage , current_thread)
179 debug_only(VMNativeEntryWrapper __vew;)
180
181 JavaThread* java_thread = NULL;
182 ThreadsListHandle tlh(current_thread);
183 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
184 if (err != JVMTI_ERROR_NONE) {
185 return err;
186 }
187
188 JvmtiThreadState* state = java_thread->jvmti_thread_state();
189 *data_ptr = (state == NULL) ? NULL :
190 state->env_thread_state(this)->get_agent_thread_local_storage_data();
191 }
192 return JVMTI_ERROR_NONE;
193 } /* end GetThreadLocalStorage */
194
195 //
196 // Module functions
197 //
198
199 // module_count_ptr - pre-checked for NULL
200 // modules_ptr - pre-checked for NULL
201 jvmtiError
202 JvmtiEnv::GetAllModules(jint* module_count_ptr, jobject** modules_ptr) {
203 JvmtiModuleClosure jmc;
204
205 return jmc.get_all_modules(this, module_count_ptr, modules_ptr);
206 } /* end GetAllModules */
207
208
209 // class_loader - NULL is a valid value, must be pre-checked
210 // package_name - pre-checked for NULL
211 // module_ptr - pre-checked for NULL
212 jvmtiError
213 JvmtiEnv::GetNamedModule(jobject class_loader, const char* package_name, jobject* module_ptr) {
214 JavaThread* THREAD = JavaThread::current(); // pass to macros
215 ResourceMark rm(THREAD);
216
217 Handle h_loader (THREAD, JNIHandles::resolve(class_loader));
218 // Check that loader is a subclass of java.lang.ClassLoader.
219 if (h_loader.not_null() && !java_lang_ClassLoader::is_subclass(h_loader->klass())) {
220 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
221 }
222 jobject module = Modules::get_named_module(h_loader, package_name, THREAD);
223 if (HAS_PENDING_EXCEPTION) {
224 CLEAR_PENDING_EXCEPTION;
225 return JVMTI_ERROR_INTERNAL; // unexpected exception
226 }
227 *module_ptr = module;
228 return JVMTI_ERROR_NONE;
229 } /* end GetNamedModule */
230
231
232 // module - pre-checked for NULL
233 // to_module - pre-checked for NULL
234 jvmtiError
235 JvmtiEnv::AddModuleReads(jobject module, jobject to_module) {
236 JavaThread* THREAD = JavaThread::current();
237
238 // check module
239 Handle h_module(THREAD, JNIHandles::resolve(module));
240 if (!java_lang_Module::is_instance(h_module())) {
241 return JVMTI_ERROR_INVALID_MODULE;
242 }
243 // check to_module
244 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
245 if (!java_lang_Module::is_instance(h_to_module())) {
246 return JVMTI_ERROR_INVALID_MODULE;
247 }
248 return JvmtiExport::add_module_reads(h_module, h_to_module, THREAD);
249 } /* end AddModuleReads */
250
251
252 // module - pre-checked for NULL
253 // pkg_name - pre-checked for NULL
254 // to_module - pre-checked for NULL
255 jvmtiError
256 JvmtiEnv::AddModuleExports(jobject module, const char* pkg_name, jobject to_module) {
257 JavaThread* THREAD = JavaThread::current();
258 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
259
260 // check module
261 Handle h_module(THREAD, JNIHandles::resolve(module));
262 if (!java_lang_Module::is_instance(h_module())) {
263 return JVMTI_ERROR_INVALID_MODULE;
264 }
265 // check to_module
266 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
267 if (!java_lang_Module::is_instance(h_to_module())) {
268 return JVMTI_ERROR_INVALID_MODULE;
269 }
270 return JvmtiExport::add_module_exports(h_module, h_pkg, h_to_module, THREAD);
271 } /* end AddModuleExports */
272
273
274 // module - pre-checked for NULL
275 // pkg_name - pre-checked for NULL
276 // to_module - pre-checked for NULL
277 jvmtiError
278 JvmtiEnv::AddModuleOpens(jobject module, const char* pkg_name, jobject to_module) {
279 JavaThread* THREAD = JavaThread::current();
280 Handle h_pkg = java_lang_String::create_from_str(pkg_name, THREAD);
281
282 // check module
283 Handle h_module(THREAD, JNIHandles::resolve(module));
284 if (!java_lang_Module::is_instance(h_module())) {
285 return JVMTI_ERROR_INVALID_MODULE;
286 }
287 // check to_module
288 Handle h_to_module(THREAD, JNIHandles::resolve(to_module));
289 if (!java_lang_Module::is_instance(h_to_module())) {
290 return JVMTI_ERROR_INVALID_MODULE;
291 }
292 return JvmtiExport::add_module_opens(h_module, h_pkg, h_to_module, THREAD);
293 } /* end AddModuleOpens */
294
295
296 // module - pre-checked for NULL
297 // service - pre-checked for NULL
298 jvmtiError
299 JvmtiEnv::AddModuleUses(jobject module, jclass service) {
300 JavaThread* THREAD = JavaThread::current();
301
302 // check module
303 Handle h_module(THREAD, JNIHandles::resolve(module));
304 if (!java_lang_Module::is_instance(h_module())) {
305 return JVMTI_ERROR_INVALID_MODULE;
306 }
307 // check service
308 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
309 if (!java_lang_Class::is_instance(h_service()) ||
310 java_lang_Class::is_primitive(h_service())) {
311 return JVMTI_ERROR_INVALID_CLASS;
312 }
313 return JvmtiExport::add_module_uses(h_module, h_service, THREAD);
314 } /* end AddModuleUses */
315
316
317 // module - pre-checked for NULL
318 // service - pre-checked for NULL
319 // impl_class - pre-checked for NULL
320 jvmtiError
321 JvmtiEnv::AddModuleProvides(jobject module, jclass service, jclass impl_class) {
322 JavaThread* THREAD = JavaThread::current();
323
324 // check module
325 Handle h_module(THREAD, JNIHandles::resolve(module));
326 if (!java_lang_Module::is_instance(h_module())) {
327 return JVMTI_ERROR_INVALID_MODULE;
328 }
329 // check service
330 Handle h_service(THREAD, JNIHandles::resolve_external_guard(service));
331 if (!java_lang_Class::is_instance(h_service()) ||
332 java_lang_Class::is_primitive(h_service())) {
333 return JVMTI_ERROR_INVALID_CLASS;
334 }
335 // check impl_class
336 Handle h_impl_class(THREAD, JNIHandles::resolve_external_guard(impl_class));
337 if (!java_lang_Class::is_instance(h_impl_class()) ||
338 java_lang_Class::is_primitive(h_impl_class())) {
339 return JVMTI_ERROR_INVALID_CLASS;
340 }
341 return JvmtiExport::add_module_provides(h_module, h_service, h_impl_class, THREAD);
342 } /* end AddModuleProvides */
343
344 // module - pre-checked for NULL
345 // is_modifiable_class_ptr - pre-checked for NULL
346 jvmtiError
347 JvmtiEnv::IsModifiableModule(jobject module, jboolean* is_modifiable_module_ptr) {
348 JavaThread* THREAD = JavaThread::current();
349
350 // check module
351 Handle h_module(THREAD, JNIHandles::resolve(module));
352 if (!java_lang_Module::is_instance(h_module())) {
353 return JVMTI_ERROR_INVALID_MODULE;
354 }
355
356 *is_modifiable_module_ptr = JNI_TRUE;
357 return JVMTI_ERROR_NONE;
358 } /* end IsModifiableModule */
359
360
361 //
362 // Class functions
363 //
364
365 // class_count_ptr - pre-checked for NULL
366 // classes_ptr - pre-checked for NULL
367 jvmtiError
368 JvmtiEnv::GetLoadedClasses(jint* class_count_ptr, jclass** classes_ptr) {
369 return JvmtiGetLoadedClasses::getLoadedClasses(this, class_count_ptr, classes_ptr);
370 } /* end GetLoadedClasses */
371
372
373 // initiating_loader - NULL is a valid value, must be checked
374 // class_count_ptr - pre-checked for NULL
375 // classes_ptr - pre-checked for NULL
376 jvmtiError
377 JvmtiEnv::GetClassLoaderClasses(jobject initiating_loader, jint* class_count_ptr, jclass** classes_ptr) {
378 return JvmtiGetLoadedClasses::getClassLoaderClasses(this, initiating_loader,
379 class_count_ptr, classes_ptr);
380 } /* end GetClassLoaderClasses */
381
382 // k_mirror - may be primitive, this must be checked
383 // is_modifiable_class_ptr - pre-checked for NULL
384 jvmtiError
385 JvmtiEnv::IsModifiableClass(oop k_mirror, jboolean* is_modifiable_class_ptr) {
386 *is_modifiable_class_ptr = VM_RedefineClasses::is_modifiable_class(k_mirror)?
387 JNI_TRUE : JNI_FALSE;
388 return JVMTI_ERROR_NONE;
389 } /* end IsModifiableClass */
390
391 // class_count - pre-checked to be greater than or equal to 0
392 // classes - pre-checked for NULL
393 jvmtiError
394 JvmtiEnv::RetransformClasses(jint class_count, const jclass* classes) {
395 //TODO: add locking
396
397 int index;
398 JavaThread* current_thread = JavaThread::current();
399 ResourceMark rm(current_thread);
400
401 jvmtiClassDefinition* class_definitions =
402 NEW_RESOURCE_ARRAY(jvmtiClassDefinition, class_count);
403 NULL_CHECK(class_definitions, JVMTI_ERROR_OUT_OF_MEMORY);
404
405 for (index = 0; index < class_count; index++) {
406 HandleMark hm(current_thread);
407
408 jclass jcls = classes[index];
409 oop k_mirror = JNIHandles::resolve_external_guard(jcls);
410 if (k_mirror == NULL) {
411 return JVMTI_ERROR_INVALID_CLASS;
412 }
413 if (!k_mirror->is_a(SystemDictionary::Class_klass())) {
414 return JVMTI_ERROR_INVALID_CLASS;
415 }
416
417 if (!VM_RedefineClasses::is_modifiable_class(k_mirror)) {
418 return JVMTI_ERROR_UNMODIFIABLE_CLASS;
419 }
420
421 Klass* klass = java_lang_Class::as_Klass(k_mirror);
422
423 jint status = klass->jvmti_class_status();
424 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
425 return JVMTI_ERROR_INVALID_CLASS;
426 }
427
428 InstanceKlass* ik = InstanceKlass::cast(klass);
429 if (ik->get_cached_class_file_bytes() == NULL) {
430 // Not cached, we need to reconstitute the class file from the
431 // VM representation. We don't attach the reconstituted class
432 // bytes to the InstanceKlass here because they have not been
433 // validated and we're not at a safepoint.
434 JvmtiClassFileReconstituter reconstituter(ik);
435 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
436 return reconstituter.get_error();
437 }
438
439 class_definitions[index].class_byte_count = (jint)reconstituter.class_file_size();
440 class_definitions[index].class_bytes = (unsigned char*)
441 reconstituter.class_file_bytes();
442 } else {
443 // it is cached, get it from the cache
444 class_definitions[index].class_byte_count = ik->get_cached_class_file_len();
445 class_definitions[index].class_bytes = ik->get_cached_class_file_bytes();
446 }
447 class_definitions[index].klass = jcls;
448 }
449 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_retransform);
450 VMThread::execute(&op);
451 return (op.check_error());
452 } /* end RetransformClasses */
453
454
455 // class_count - pre-checked to be greater than or equal to 0
456 // class_definitions - pre-checked for NULL
457 jvmtiError
458 JvmtiEnv::RedefineClasses(jint class_count, const jvmtiClassDefinition* class_definitions) {
459 //TODO: add locking
460 VM_RedefineClasses op(class_count, class_definitions, jvmti_class_load_kind_redefine);
461 VMThread::execute(&op);
462 return (op.check_error());
463 } /* end RedefineClasses */
464
465
466 //
467 // Object functions
468 //
469
470 // size_ptr - pre-checked for NULL
471 jvmtiError
472 JvmtiEnv::GetObjectSize(jobject object, jlong* size_ptr) {
473 oop mirror = JNIHandles::resolve_external_guard(object);
474 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
475 *size_ptr = (jlong)Universe::heap()->obj_size(mirror) * wordSize;
476 return JVMTI_ERROR_NONE;
477 } /* end GetObjectSize */
478
479 //
480 // Method functions
481 //
482
483 // prefix - NULL is a valid value, must be checked
484 jvmtiError
485 JvmtiEnv::SetNativeMethodPrefix(const char* prefix) {
486 return prefix == NULL?
487 SetNativeMethodPrefixes(0, NULL) :
488 SetNativeMethodPrefixes(1, (char**)&prefix);
489 } /* end SetNativeMethodPrefix */
490
491
492 // prefix_count - pre-checked to be greater than or equal to 0
493 // prefixes - pre-checked for NULL
494 jvmtiError
495 JvmtiEnv::SetNativeMethodPrefixes(jint prefix_count, char** prefixes) {
496 // Have to grab JVMTI thread state lock to be sure that some thread
497 // isn't accessing the prefixes at the same time we are setting them.
498 // No locks during VM bring-up.
499 if (Threads::number_of_threads() == 0) {
500 return set_native_method_prefixes(prefix_count, prefixes);
501 } else {
502 MutexLocker mu(JvmtiThreadState_lock);
503 return set_native_method_prefixes(prefix_count, prefixes);
504 }
505 } /* end SetNativeMethodPrefixes */
506
507 //
508 // Event Management functions
509 //
510
511 // callbacks - NULL is a valid value, must be checked
512 // size_of_callbacks - pre-checked to be greater than or equal to 0
513 jvmtiError
514 JvmtiEnv::SetEventCallbacks(const jvmtiEventCallbacks* callbacks, jint size_of_callbacks) {
515 JvmtiEventController::set_event_callbacks(this, callbacks, size_of_callbacks);
516 return JVMTI_ERROR_NONE;
517 } /* end SetEventCallbacks */
518
519
520 // event_thread - NULL is a valid value, must be checked
521 jvmtiError
522 JvmtiEnv::SetEventNotificationMode(jvmtiEventMode mode, jvmtiEvent event_type, jthread event_thread, ...) {
523 if (event_thread == NULL) {
524 // Can be called at Agent_OnLoad() time with event_thread == NULL
525 // when Thread::current() does not work yet so we cannot create a
526 // ThreadsListHandle that is common to both thread-specific and
527 // global code paths.
528
529 // event_type must be valid
530 if (!JvmtiEventController::is_valid_event_type(event_type)) {
531 return JVMTI_ERROR_INVALID_EVENT_TYPE;
532 }
533
534 bool enabled = (mode == JVMTI_ENABLE);
535
536 // assure that needed capabilities are present
537 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
538 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
539 }
540
541 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
542 record_class_file_load_hook_enabled();
543 }
544
545 JvmtiEventController::set_user_enabled(this, (JavaThread*) NULL, event_type, enabled);
546 } else {
547 // We have a specified event_thread.
548 JavaThread* java_thread = NULL;
549 ThreadsListHandle tlh;
550 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), event_thread, &java_thread, NULL);
551 if (err != JVMTI_ERROR_NONE) {
552 return err;
553 }
554
555 // event_type must be valid
556 if (!JvmtiEventController::is_valid_event_type(event_type)) {
557 return JVMTI_ERROR_INVALID_EVENT_TYPE;
558 }
559
560 // global events cannot be controlled at thread level.
561 if (JvmtiEventController::is_global_event(event_type)) {
562 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
563 }
564
565 bool enabled = (mode == JVMTI_ENABLE);
566
567 // assure that needed capabilities are present
568 if (enabled && !JvmtiUtil::has_event_capability(event_type, get_capabilities())) {
569 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
570 }
571
572 if (event_type == JVMTI_EVENT_CLASS_FILE_LOAD_HOOK && enabled) {
573 record_class_file_load_hook_enabled();
574 }
575 JvmtiEventController::set_user_enabled(this, java_thread, event_type, enabled);
576 }
577
578 return JVMTI_ERROR_NONE;
579 } /* end SetEventNotificationMode */
580
581 //
582 // Capability functions
583 //
584
585 // capabilities_ptr - pre-checked for NULL
586 jvmtiError
587 JvmtiEnv::GetPotentialCapabilities(jvmtiCapabilities* capabilities_ptr) {
588 JvmtiManageCapabilities::get_potential_capabilities(get_capabilities(),
589 get_prohibited_capabilities(),
590 capabilities_ptr);
591 return JVMTI_ERROR_NONE;
592 } /* end GetPotentialCapabilities */
593
594
595 // capabilities_ptr - pre-checked for NULL
596 jvmtiError
597 JvmtiEnv::AddCapabilities(const jvmtiCapabilities* capabilities_ptr) {
598 return JvmtiManageCapabilities::add_capabilities(get_capabilities(),
599 get_prohibited_capabilities(),
600 capabilities_ptr,
601 get_capabilities());
602 } /* end AddCapabilities */
603
604
605 // capabilities_ptr - pre-checked for NULL
606 jvmtiError
607 JvmtiEnv::RelinquishCapabilities(const jvmtiCapabilities* capabilities_ptr) {
608 JvmtiManageCapabilities::relinquish_capabilities(get_capabilities(), capabilities_ptr, get_capabilities());
609 return JVMTI_ERROR_NONE;
610 } /* end RelinquishCapabilities */
611
612
613 // capabilities_ptr - pre-checked for NULL
614 jvmtiError
615 JvmtiEnv::GetCapabilities(jvmtiCapabilities* capabilities_ptr) {
616 JvmtiManageCapabilities::copy_capabilities(get_capabilities(), capabilities_ptr);
617 return JVMTI_ERROR_NONE;
618 } /* end GetCapabilities */
619
620 //
621 // Class Loader Search functions
622 //
623
624 // segment - pre-checked for NULL
625 jvmtiError
626 JvmtiEnv::AddToBootstrapClassLoaderSearch(const char* segment) {
627 jvmtiPhase phase = get_phase();
628 if (phase == JVMTI_PHASE_ONLOAD) {
629 Arguments::append_sysclasspath(segment);
630 return JVMTI_ERROR_NONE;
631 } else if (use_version_1_0_semantics()) {
632 // This JvmtiEnv requested version 1.0 semantics and this function
633 // is only allowed in the ONLOAD phase in version 1.0 so we need to
634 // return an error here.
635 return JVMTI_ERROR_WRONG_PHASE;
636 } else if (phase == JVMTI_PHASE_LIVE) {
637 // The phase is checked by the wrapper that called this function,
638 // but this thread could be racing with the thread that is
639 // terminating the VM so we check one more time.
640
641 // create the zip entry
642 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, true);
643 if (zip_entry == NULL) {
644 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
645 }
646
647 // lock the loader
648 Thread* thread = Thread::current();
649 HandleMark hm;
650 Handle loader_lock = Handle(thread, SystemDictionary::system_loader_lock());
651
652 ObjectLocker ol(loader_lock, thread);
653
654 // add the jar file to the bootclasspath
655 log_info(class, load)("opened: %s", zip_entry->name());
656 #if INCLUDE_CDS
657 ClassLoaderExt::append_boot_classpath(zip_entry);
658 #else
659 ClassLoader::add_to_boot_append_entries(zip_entry);
660 #endif
661 return JVMTI_ERROR_NONE;
662 } else {
663 return JVMTI_ERROR_WRONG_PHASE;
664 }
665
666 } /* end AddToBootstrapClassLoaderSearch */
667
668
669 // segment - pre-checked for NULL
670 jvmtiError
671 JvmtiEnv::AddToSystemClassLoaderSearch(const char* segment) {
672 jvmtiPhase phase = get_phase();
673
674 if (phase == JVMTI_PHASE_ONLOAD) {
675 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
676 if (strcmp("java.class.path", p->key()) == 0) {
677 p->append_value(segment);
678 break;
679 }
680 }
681 return JVMTI_ERROR_NONE;
682 } else if (phase == JVMTI_PHASE_LIVE) {
683 // The phase is checked by the wrapper that called this function,
684 // but this thread could be racing with the thread that is
685 // terminating the VM so we check one more time.
686 HandleMark hm;
687
688 // create the zip entry (which will open the zip file and hence
689 // check that the segment is indeed a zip file).
690 ClassPathZipEntry* zip_entry = ClassLoader::create_class_path_zip_entry(segment, false);
691 if (zip_entry == NULL) {
692 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
693 }
694 delete zip_entry; // no longer needed
695
696 // lock the loader
697 Thread* THREAD = Thread::current();
698 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader());
699
700 ObjectLocker ol(loader, THREAD);
701
702 // need the path as java.lang.String
703 Handle path = java_lang_String::create_from_platform_dependent_str(segment, THREAD);
704 if (HAS_PENDING_EXCEPTION) {
705 CLEAR_PENDING_EXCEPTION;
706 return JVMTI_ERROR_INTERNAL;
707 }
708
709 // Invoke the appendToClassPathForInstrumentation method - if the method
710 // is not found it means the loader doesn't support adding to the class path
711 // in the live phase.
712 {
713 JavaValue res(T_VOID);
714 JavaCalls::call_special(&res,
715 loader,
716 loader->klass(),
717 vmSymbols::appendToClassPathForInstrumentation_name(),
718 vmSymbols::appendToClassPathForInstrumentation_signature(),
719 path,
720 THREAD);
721 if (HAS_PENDING_EXCEPTION) {
722 Symbol* ex_name = PENDING_EXCEPTION->klass()->name();
723 CLEAR_PENDING_EXCEPTION;
724
725 if (ex_name == vmSymbols::java_lang_NoSuchMethodError()) {
726 return JVMTI_ERROR_CLASS_LOADER_UNSUPPORTED;
727 } else {
728 return JVMTI_ERROR_INTERNAL;
729 }
730 }
731 }
732
733 return JVMTI_ERROR_NONE;
734 } else {
735 return JVMTI_ERROR_WRONG_PHASE;
736 }
737 } /* end AddToSystemClassLoaderSearch */
738
739 //
740 // General functions
741 //
742
743 // phase_ptr - pre-checked for NULL
744 jvmtiError
745 JvmtiEnv::GetPhase(jvmtiPhase* phase_ptr) {
746 *phase_ptr = phase();
747 return JVMTI_ERROR_NONE;
748 } /* end GetPhase */
749
750
751 jvmtiError
752 JvmtiEnv::DisposeEnvironment() {
753 dispose();
754 return JVMTI_ERROR_NONE;
755 } /* end DisposeEnvironment */
756
757
758 // data - NULL is a valid value, must be checked
759 jvmtiError
760 JvmtiEnv::SetEnvironmentLocalStorage(const void* data) {
761 set_env_local_storage(data);
762 return JVMTI_ERROR_NONE;
763 } /* end SetEnvironmentLocalStorage */
764
765
766 // data_ptr - pre-checked for NULL
767 jvmtiError
768 JvmtiEnv::GetEnvironmentLocalStorage(void** data_ptr) {
769 *data_ptr = (void*)get_env_local_storage();
770 return JVMTI_ERROR_NONE;
771 } /* end GetEnvironmentLocalStorage */
772
773 // version_ptr - pre-checked for NULL
774 jvmtiError
775 JvmtiEnv::GetVersionNumber(jint* version_ptr) {
776 *version_ptr = JVMTI_VERSION;
777 return JVMTI_ERROR_NONE;
778 } /* end GetVersionNumber */
779
780
781 // name_ptr - pre-checked for NULL
782 jvmtiError
783 JvmtiEnv::GetErrorName(jvmtiError error, char** name_ptr) {
784 if (error < JVMTI_ERROR_NONE || error > JVMTI_ERROR_MAX) {
785 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
786 }
787 const char *name = JvmtiUtil::error_name(error);
788 if (name == NULL) {
789 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
790 }
791 size_t len = strlen(name) + 1;
792 jvmtiError err = allocate(len, (unsigned char**)name_ptr);
793 if (err == JVMTI_ERROR_NONE) {
794 memcpy(*name_ptr, name, len);
795 }
796 return err;
797 } /* end GetErrorName */
798
799
800 jvmtiError
801 JvmtiEnv::SetVerboseFlag(jvmtiVerboseFlag flag, jboolean value) {
802 LogLevelType level = value == 0 ? LogLevel::Off : LogLevel::Info;
803 switch (flag) {
804 case JVMTI_VERBOSE_OTHER:
805 // ignore
806 break;
807 case JVMTI_VERBOSE_CLASS:
808 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, unload));
809 LogConfiguration::configure_stdout(level, false, LOG_TAGS(class, load));
810 break;
811 case JVMTI_VERBOSE_GC:
812 if (value == 0) {
813 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(gc));
814 } else {
815 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
816 }
817 break;
818 case JVMTI_VERBOSE_JNI:
819 PrintJNIResolving = value != 0;
820 break;
821 default:
822 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
823 };
824 return JVMTI_ERROR_NONE;
825 } /* end SetVerboseFlag */
826
827
828 // format_ptr - pre-checked for NULL
829 jvmtiError
830 JvmtiEnv::GetJLocationFormat(jvmtiJlocationFormat* format_ptr) {
831 *format_ptr = JVMTI_JLOCATION_JVMBCI;
832 return JVMTI_ERROR_NONE;
833 } /* end GetJLocationFormat */
834
835 //
836 // Thread functions
837 //
838
839 // Threads_lock NOT held
840 // thread - NOT pre-checked
841 // thread_state_ptr - pre-checked for NULL
842 jvmtiError
843 JvmtiEnv::GetThreadState(jthread thread, jint* thread_state_ptr) {
844 JavaThread* current_thread = JavaThread::current();
845 JavaThread* java_thread = NULL;
846 oop thread_oop = NULL;
847 ThreadsListHandle tlh(current_thread);
848
849 if (thread == NULL) {
850 java_thread = current_thread;
851 thread_oop = java_thread->threadObj();
852
853 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
854 return JVMTI_ERROR_INVALID_THREAD;
855 }
856 } else {
857 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
858 if (err != JVMTI_ERROR_NONE) {
859 // We got an error code so we don't have a JavaThread *, but
860 // only return an error from here if we didn't get a valid
861 // thread_oop.
862 if (thread_oop == NULL) {
863 return err;
864 }
865 // We have a valid thread_oop so we can return some thread state.
866 }
867 }
868
869 // get most state bits
870 jint state = (jint)java_lang_Thread::get_thread_status(thread_oop);
871
872 if (java_thread != NULL) {
873 // We have a JavaThread* so add more state bits.
874 JavaThreadState jts = java_thread->thread_state();
875
876 if (java_thread->is_being_ext_suspended()) {
877 state |= JVMTI_THREAD_STATE_SUSPENDED;
878 }
879 if (jts == _thread_in_native) {
880 state |= JVMTI_THREAD_STATE_IN_NATIVE;
881 }
882 OSThread* osThread = java_thread->osthread();
883 if (osThread != NULL && osThread->interrupted()) {
884 state |= JVMTI_THREAD_STATE_INTERRUPTED;
885 }
886 }
887
888 *thread_state_ptr = state;
889 return JVMTI_ERROR_NONE;
890 } /* end GetThreadState */
891
892
893 // thread_ptr - pre-checked for NULL
894 jvmtiError
895 JvmtiEnv::GetCurrentThread(jthread* thread_ptr) {
896 JavaThread* current_thread = JavaThread::current();
897 *thread_ptr = (jthread)JNIHandles::make_local(current_thread, current_thread->threadObj());
898 return JVMTI_ERROR_NONE;
899 } /* end GetCurrentThread */
900
901
902 // threads_count_ptr - pre-checked for NULL
903 // threads_ptr - pre-checked for NULL
904 jvmtiError
905 JvmtiEnv::GetAllThreads(jint* threads_count_ptr, jthread** threads_ptr) {
906 int nthreads = 0;
907 Handle *thread_objs = NULL;
908 ResourceMark rm;
909 HandleMark hm;
910
911 // enumerate threads (including agent threads)
912 ThreadsListEnumerator tle(Thread::current(), true);
913 nthreads = tle.num_threads();
914 *threads_count_ptr = nthreads;
915
916 if (nthreads == 0) {
917 *threads_ptr = NULL;
918 return JVMTI_ERROR_NONE;
919 }
920
921 thread_objs = NEW_RESOURCE_ARRAY(Handle, nthreads);
922 NULL_CHECK(thread_objs, JVMTI_ERROR_OUT_OF_MEMORY);
923
924 for (int i = 0; i < nthreads; i++) {
925 thread_objs[i] = Handle(tle.get_threadObj(i));
926 }
927
928 jthread *jthreads = new_jthreadArray(nthreads, thread_objs);
929 NULL_CHECK(jthreads, JVMTI_ERROR_OUT_OF_MEMORY);
930
931 *threads_ptr = jthreads;
932 return JVMTI_ERROR_NONE;
933 } /* end GetAllThreads */
934
935
936 // Threads_lock NOT held, java_thread not protected by lock
937 // java_thread - pre-checked
938 jvmtiError
939 JvmtiEnv::SuspendThread(JavaThread* java_thread) {
940 // don't allow hidden thread suspend request.
941 if (java_thread->is_hidden_from_external_view()) {
942 return (JVMTI_ERROR_NONE);
943 }
944
945 {
946 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
947 if (java_thread->is_external_suspend()) {
948 // don't allow nested external suspend requests.
949 return (JVMTI_ERROR_THREAD_SUSPENDED);
950 }
951 if (java_thread->is_exiting()) { // thread is in the process of exiting
952 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
953 }
954 java_thread->set_external_suspend();
955 }
956
957 if (!JvmtiSuspendControl::suspend(java_thread)) {
958 // the thread was in the process of exiting
959 return (JVMTI_ERROR_THREAD_NOT_ALIVE);
960 }
961 return JVMTI_ERROR_NONE;
962 } /* end SuspendThread */
963
964
965 // request_count - pre-checked to be greater than or equal to 0
966 // request_list - pre-checked for NULL
967 // results - pre-checked for NULL
968 jvmtiError
969 JvmtiEnv::SuspendThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
970 int needSafepoint = 0; // > 0 if we need a safepoint
971 ThreadsListHandle tlh;
972 for (int i = 0; i < request_count; i++) {
973 JavaThread *java_thread = NULL;
974 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
975 if (err != JVMTI_ERROR_NONE) {
976 results[i] = err;
977 continue;
978 }
979 // don't allow hidden thread suspend request.
980 if (java_thread->is_hidden_from_external_view()) {
981 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
982 continue;
983 }
984
985 {
986 MutexLocker ml(java_thread->SR_lock(), Mutex::_no_safepoint_check_flag);
987 if (java_thread->is_external_suspend()) {
988 // don't allow nested external suspend requests.
989 results[i] = JVMTI_ERROR_THREAD_SUSPENDED;
990 continue;
991 }
992 if (java_thread->is_exiting()) { // thread is in the process of exiting
993 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
994 continue;
995 }
996 java_thread->set_external_suspend();
997 }
998 if (java_thread->thread_state() == _thread_in_native) {
999 // We need to try and suspend native threads here. Threads in
1000 // other states will self-suspend on their next transition.
1001 if (!JvmtiSuspendControl::suspend(java_thread)) {
1002 // The thread was in the process of exiting. Force another
1003 // safepoint to make sure that this thread transitions.
1004 needSafepoint++;
1005 results[i] = JVMTI_ERROR_THREAD_NOT_ALIVE;
1006 continue;
1007 }
1008 } else {
1009 needSafepoint++;
1010 }
1011 results[i] = JVMTI_ERROR_NONE; // indicate successful suspend
1012 }
1013 if (needSafepoint > 0) {
1014 VM_ThreadsSuspendJVMTI tsj;
1015 VMThread::execute(&tsj);
1016 }
1017 // per-thread suspend results returned via results parameter
1018 return JVMTI_ERROR_NONE;
1019 } /* end SuspendThreadList */
1020
1021
1022 // Threads_lock NOT held, java_thread not protected by lock
1023 // java_thread - pre-checked
1024 jvmtiError
1025 JvmtiEnv::ResumeThread(JavaThread* java_thread) {
1026 // don't allow hidden thread resume request.
1027 if (java_thread->is_hidden_from_external_view()) {
1028 return JVMTI_ERROR_NONE;
1029 }
1030
1031 if (!java_thread->is_being_ext_suspended()) {
1032 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1033 }
1034
1035 if (!JvmtiSuspendControl::resume(java_thread)) {
1036 return JVMTI_ERROR_INTERNAL;
1037 }
1038 return JVMTI_ERROR_NONE;
1039 } /* end ResumeThread */
1040
1041
1042 // request_count - pre-checked to be greater than or equal to 0
1043 // request_list - pre-checked for NULL
1044 // results - pre-checked for NULL
1045 jvmtiError
1046 JvmtiEnv::ResumeThreadList(jint request_count, const jthread* request_list, jvmtiError* results) {
1047 ThreadsListHandle tlh;
1048 for (int i = 0; i < request_count; i++) {
1049 JavaThread* java_thread = NULL;
1050 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), request_list[i], &java_thread, NULL);
1051 if (err != JVMTI_ERROR_NONE) {
1052 results[i] = err;
1053 continue;
1054 }
1055 // don't allow hidden thread resume request.
1056 if (java_thread->is_hidden_from_external_view()) {
1057 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1058 continue;
1059 }
1060 if (!java_thread->is_being_ext_suspended()) {
1061 results[i] = JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1062 continue;
1063 }
1064
1065 if (!JvmtiSuspendControl::resume(java_thread)) {
1066 results[i] = JVMTI_ERROR_INTERNAL;
1067 continue;
1068 }
1069
1070 results[i] = JVMTI_ERROR_NONE; // indicate successful resume
1071 }
1072 // per-thread resume results returned via results parameter
1073 return JVMTI_ERROR_NONE;
1074 } /* end ResumeThreadList */
1075
1076
1077 // Threads_lock NOT held, java_thread not protected by lock
1078 // java_thread - pre-checked
1079 jvmtiError
1080 JvmtiEnv::StopThread(JavaThread* java_thread, jobject exception) {
1081 oop e = JNIHandles::resolve_external_guard(exception);
1082 NULL_CHECK(e, JVMTI_ERROR_NULL_POINTER);
1083
1084 JavaThread::send_async_exception(java_thread->threadObj(), e);
1085
1086 return JVMTI_ERROR_NONE;
1087
1088 } /* end StopThread */
1089
1090
1091 // Threads_lock NOT held
1092 // thread - NOT pre-checked
1093 jvmtiError
1094 JvmtiEnv::InterruptThread(jthread thread) {
1095 // TODO: this is very similar to JVM_Interrupt(); share code in future
1096 JavaThread* current_thread = JavaThread::current();
1097 JavaThread* java_thread = NULL;
1098 ThreadsListHandle tlh(current_thread);
1099 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, NULL);
1100 if (err != JVMTI_ERROR_NONE) {
1101 return err;
1102 }
1103
1104 java_thread->interrupt();
1105
1106 return JVMTI_ERROR_NONE;
1107 } /* end InterruptThread */
1108
1109
1110 // Threads_lock NOT held
1111 // thread - NOT pre-checked
1112 // info_ptr - pre-checked for NULL
1113 jvmtiError
1114 JvmtiEnv::GetThreadInfo(jthread thread, jvmtiThreadInfo* info_ptr) {
1115 ResourceMark rm;
1116 HandleMark hm;
1117
1118 JavaThread* current_thread = JavaThread::current();
1119 ThreadsListHandle tlh(current_thread);
1120
1121 // if thread is NULL the current thread is used
1122 oop thread_oop = NULL;
1123 if (thread == NULL) {
1124 thread_oop = current_thread->threadObj();
1125 if (thread_oop == NULL || !thread_oop->is_a(SystemDictionary::Thread_klass())) {
1126 return JVMTI_ERROR_INVALID_THREAD;
1127 }
1128 } else {
1129 JavaThread* java_thread = NULL;
1130 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1131 if (err != JVMTI_ERROR_NONE) {
1132 // We got an error code so we don't have a JavaThread *, but
1133 // only return an error from here if we didn't get a valid
1134 // thread_oop.
1135 if (thread_oop == NULL) {
1136 return err;
1137 }
1138 // We have a valid thread_oop so we can return some thread info.
1139 }
1140 }
1141
1142 Handle thread_obj(current_thread, thread_oop);
1143 Handle name;
1144 ThreadPriority priority;
1145 Handle thread_group;
1146 Handle context_class_loader;
1147 bool is_daemon;
1148
1149 name = Handle(current_thread, java_lang_Thread::name(thread_obj()));
1150 priority = java_lang_Thread::priority(thread_obj());
1151 thread_group = Handle(current_thread, java_lang_Thread::threadGroup(thread_obj()));
1152 is_daemon = java_lang_Thread::is_daemon(thread_obj());
1153
1154 oop loader = java_lang_Thread::context_class_loader(thread_obj());
1155 context_class_loader = Handle(current_thread, loader);
1156
1157 { const char *n;
1158
1159 if (name() != NULL) {
1160 n = java_lang_String::as_utf8_string(name());
1161 } else {
1162 int utf8_length = 0;
1163 n = UNICODE::as_utf8((jchar*) NULL, utf8_length);
1164 }
1165
1166 info_ptr->name = (char *) jvmtiMalloc(strlen(n)+1);
1167 if (info_ptr->name == NULL)
1168 return JVMTI_ERROR_OUT_OF_MEMORY;
1169
1170 strcpy(info_ptr->name, n);
1171 }
1172 info_ptr->is_daemon = is_daemon;
1173 info_ptr->priority = priority;
1174
1175 info_ptr->context_class_loader = (context_class_loader.is_null()) ? NULL :
1176 jni_reference(context_class_loader);
1177 info_ptr->thread_group = jni_reference(thread_group);
1178
1179 return JVMTI_ERROR_NONE;
1180 } /* end GetThreadInfo */
1181
1182
1183 // Threads_lock NOT held, java_thread not protected by lock
1184 // java_thread - pre-checked
1185 // owned_monitor_count_ptr - pre-checked for NULL
1186 // owned_monitors_ptr - pre-checked for NULL
1187 jvmtiError
1188 JvmtiEnv::GetOwnedMonitorInfo(JavaThread* java_thread, jint* owned_monitor_count_ptr, jobject** owned_monitors_ptr) {
1189 jvmtiError err = JVMTI_ERROR_NONE;
1190 JavaThread* calling_thread = JavaThread::current();
1191
1192 // growable array of jvmti monitors info on the C-heap
1193 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1194 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1195
1196 // It is only safe to perform the direct operation on the current
1197 // thread. All other usage needs to use a vm-safepoint-op for safety.
1198 if (java_thread == calling_thread) {
1199 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1200 } else {
1201 // JVMTI get monitors info at safepoint. Do not require target thread to
1202 // be suspended.
1203 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1204 VMThread::execute(&op);
1205 err = op.result();
1206 }
1207 jint owned_monitor_count = owned_monitors_list->length();
1208 if (err == JVMTI_ERROR_NONE) {
1209 if ((err = allocate(owned_monitor_count * sizeof(jobject *),
1210 (unsigned char**)owned_monitors_ptr)) == JVMTI_ERROR_NONE) {
1211 // copy into the returned array
1212 for (int i = 0; i < owned_monitor_count; i++) {
1213 (*owned_monitors_ptr)[i] =
1214 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1215 }
1216 *owned_monitor_count_ptr = owned_monitor_count;
1217 }
1218 }
1219 // clean up.
1220 for (int i = 0; i < owned_monitor_count; i++) {
1221 deallocate((unsigned char*)owned_monitors_list->at(i));
1222 }
1223 delete owned_monitors_list;
1224
1225 return err;
1226 } /* end GetOwnedMonitorInfo */
1227
1228
1229 // Threads_lock NOT held, java_thread not protected by lock
1230 // java_thread - pre-checked
1231 // monitor_info_count_ptr - pre-checked for NULL
1232 // monitor_info_ptr - pre-checked for NULL
1233 jvmtiError
1234 JvmtiEnv::GetOwnedMonitorStackDepthInfo(JavaThread* java_thread, jint* monitor_info_count_ptr, jvmtiMonitorStackDepthInfo** monitor_info_ptr) {
1235 jvmtiError err = JVMTI_ERROR_NONE;
1236 JavaThread* calling_thread = JavaThread::current();
1237
1238 // growable array of jvmti monitors info on the C-heap
1239 GrowableArray<jvmtiMonitorStackDepthInfo*> *owned_monitors_list =
1240 new (ResourceObj::C_HEAP, mtInternal) GrowableArray<jvmtiMonitorStackDepthInfo*>(1, true);
1241
1242 // It is only safe to perform the direct operation on the current
1243 // thread. All other usage needs to use a vm-safepoint-op for safety.
1244 if (java_thread == calling_thread) {
1245 err = get_owned_monitors(calling_thread, java_thread, owned_monitors_list);
1246 } else {
1247 // JVMTI get owned monitors info at safepoint. Do not require target thread to
1248 // be suspended.
1249 VM_GetOwnedMonitorInfo op(this, calling_thread, java_thread, owned_monitors_list);
1250 VMThread::execute(&op);
1251 err = op.result();
1252 }
1253
1254 jint owned_monitor_count = owned_monitors_list->length();
1255 if (err == JVMTI_ERROR_NONE) {
1256 if ((err = allocate(owned_monitor_count * sizeof(jvmtiMonitorStackDepthInfo),
1257 (unsigned char**)monitor_info_ptr)) == JVMTI_ERROR_NONE) {
1258 // copy to output array.
1259 for (int i = 0; i < owned_monitor_count; i++) {
1260 (*monitor_info_ptr)[i].monitor =
1261 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->monitor;
1262 (*monitor_info_ptr)[i].stack_depth =
1263 ((jvmtiMonitorStackDepthInfo*)owned_monitors_list->at(i))->stack_depth;
1264 }
1265 }
1266 *monitor_info_count_ptr = owned_monitor_count;
1267 }
1268
1269 // clean up.
1270 for (int i = 0; i < owned_monitor_count; i++) {
1271 deallocate((unsigned char*)owned_monitors_list->at(i));
1272 }
1273 delete owned_monitors_list;
1274
1275 return err;
1276 } /* end GetOwnedMonitorStackDepthInfo */
1277
1278
1279 // Threads_lock NOT held, java_thread not protected by lock
1280 // java_thread - pre-checked
1281 // monitor_ptr - pre-checked for NULL
1282 jvmtiError
1283 JvmtiEnv::GetCurrentContendedMonitor(JavaThread* java_thread, jobject* monitor_ptr) {
1284 jvmtiError err = JVMTI_ERROR_NONE;
1285 JavaThread* calling_thread = JavaThread::current();
1286
1287 // It is only safe to perform the direct operation on the current
1288 // thread. All other usage needs to use a vm-safepoint-op for safety.
1289 if (java_thread == calling_thread) {
1290 err = get_current_contended_monitor(calling_thread, java_thread, monitor_ptr);
1291 } else {
1292 // get contended monitor information at safepoint.
1293 VM_GetCurrentContendedMonitor op(this, calling_thread, java_thread, monitor_ptr);
1294 VMThread::execute(&op);
1295 err = op.result();
1296 }
1297 return err;
1298 } /* end GetCurrentContendedMonitor */
1299
1300
1301 // Threads_lock NOT held
1302 // thread - NOT pre-checked
1303 // proc - pre-checked for NULL
1304 // arg - NULL is a valid value, must be checked
1305 jvmtiError
1306 JvmtiEnv::RunAgentThread(jthread thread, jvmtiStartFunction proc, const void* arg, jint priority) {
1307 JavaThread* current_thread = JavaThread::current();
1308
1309 JavaThread* java_thread = NULL;
1310 oop thread_oop = NULL;
1311 ThreadsListHandle tlh(current_thread);
1312 jvmtiError err = JvmtiExport::cv_external_thread_to_JavaThread(tlh.list(), thread, &java_thread, &thread_oop);
1313 if (err != JVMTI_ERROR_NONE) {
1314 // We got an error code so we don't have a JavaThread *, but
1315 // only return an error from here if we didn't get a valid
1316 // thread_oop.
1317 if (thread_oop == NULL) {
1318 return err;
1319 }
1320 // We have a valid thread_oop.
1321 }
1322
1323 if (java_thread != NULL) {
1324 // 'thread' refers to an existing JavaThread.
1325 return JVMTI_ERROR_INVALID_THREAD;
1326 }
1327
1328 if (priority < JVMTI_THREAD_MIN_PRIORITY || priority > JVMTI_THREAD_MAX_PRIORITY) {
1329 return JVMTI_ERROR_INVALID_PRIORITY;
1330 }
1331
1332 Handle thread_hndl(current_thread, thread_oop);
1333 {
1334 MutexLocker mu(Threads_lock); // grab Threads_lock
1335
1336 JvmtiAgentThread *new_thread = new JvmtiAgentThread(this, proc, arg);
1337
1338 // At this point it may be possible that no osthread was created for the
1339 // JavaThread due to lack of memory.
1340 if (new_thread == NULL || new_thread->osthread() == NULL) {
1341 if (new_thread != NULL) {
1342 new_thread->smr_delete();
1343 }
1344 return JVMTI_ERROR_OUT_OF_MEMORY;
1345 }
1346
1347 java_lang_Thread::set_thread(thread_hndl(), new_thread);
1348 java_lang_Thread::set_priority(thread_hndl(), (ThreadPriority)priority);
1349 java_lang_Thread::set_daemon(thread_hndl());
1350
1351 new_thread->set_threadObj(thread_hndl());
1352 Threads::add(new_thread);
1353 Thread::start(new_thread);
1354 } // unlock Threads_lock
1355
1356 return JVMTI_ERROR_NONE;
1357 } /* end RunAgentThread */
1358
1359 //
1360 // Thread Group functions
1361 //
1362
1363 // group_count_ptr - pre-checked for NULL
1364 // groups_ptr - pre-checked for NULL
1365 jvmtiError
1366 JvmtiEnv::GetTopThreadGroups(jint* group_count_ptr, jthreadGroup** groups_ptr) {
1367 JavaThread* current_thread = JavaThread::current();
1368
1369 // Only one top level thread group now.
1370 *group_count_ptr = 1;
1371
1372 // Allocate memory to store global-refs to the thread groups.
1373 // Assume this area is freed by caller.
1374 *groups_ptr = (jthreadGroup *) jvmtiMalloc((sizeof(jthreadGroup)) * (*group_count_ptr));
1375
1376 NULL_CHECK(*groups_ptr, JVMTI_ERROR_OUT_OF_MEMORY);
1377
1378 // Convert oop to Handle, then convert Handle to global-ref.
1379 {
1380 HandleMark hm(current_thread);
1381 Handle system_thread_group(current_thread, Universe::system_thread_group());
1382 *groups_ptr[0] = jni_reference(system_thread_group);
1383 }
1384
1385 return JVMTI_ERROR_NONE;
1386 } /* end GetTopThreadGroups */
1387
1388
1389 // info_ptr - pre-checked for NULL
1390 jvmtiError
1391 JvmtiEnv::GetThreadGroupInfo(jthreadGroup group, jvmtiThreadGroupInfo* info_ptr) {
1392 ResourceMark rm;
1393 HandleMark hm;
1394
1395 JavaThread* current_thread = JavaThread::current();
1396
1397 Handle group_obj (current_thread, JNIHandles::resolve_external_guard(group));
1398 NULL_CHECK(group_obj(), JVMTI_ERROR_INVALID_THREAD_GROUP);
1399
1400 const char* name;
1401 Handle parent_group;
1402 bool is_daemon;
1403 ThreadPriority max_priority;
1404
1405 name = java_lang_ThreadGroup::name(group_obj());
1406 parent_group = Handle(current_thread, java_lang_ThreadGroup::parent(group_obj()));
1407 is_daemon = java_lang_ThreadGroup::is_daemon(group_obj());
1408 max_priority = java_lang_ThreadGroup::maxPriority(group_obj());
1409
1410 info_ptr->is_daemon = is_daemon;
1411 info_ptr->max_priority = max_priority;
1412 info_ptr->parent = jni_reference(parent_group);
1413
1414 if (name != NULL) {
1415 info_ptr->name = (char*)jvmtiMalloc(strlen(name)+1);
1416 NULL_CHECK(info_ptr->name, JVMTI_ERROR_OUT_OF_MEMORY);
1417 strcpy(info_ptr->name, name);
1418 } else {
1419 info_ptr->name = NULL;
1420 }
1421
1422 return JVMTI_ERROR_NONE;
1423 } /* end GetThreadGroupInfo */
1424
1425
1426 // thread_count_ptr - pre-checked for NULL
1427 // threads_ptr - pre-checked for NULL
1428 // group_count_ptr - pre-checked for NULL
1429 // groups_ptr - pre-checked for NULL
1430 jvmtiError
1431 JvmtiEnv::GetThreadGroupChildren(jthreadGroup group, jint* thread_count_ptr, jthread** threads_ptr, jint* group_count_ptr, jthreadGroup** groups_ptr) {
1432 JavaThread* current_thread = JavaThread::current();
1433 oop group_obj = (oop) JNIHandles::resolve_external_guard(group);
1434 NULL_CHECK(group_obj, JVMTI_ERROR_INVALID_THREAD_GROUP);
1435
1436 Handle *thread_objs = NULL;
1437 Handle *group_objs = NULL;
1438 int nthreads = 0;
1439 int ngroups = 0;
1440 int hidden_threads = 0;
1441
1442 ResourceMark rm(current_thread);
1443 HandleMark hm(current_thread);
1444
1445 Handle group_hdl(current_thread, group_obj);
1446
1447 { // Cannot allow thread or group counts to change.
1448 ObjectLocker ol(group_hdl, current_thread);
1449
1450 nthreads = java_lang_ThreadGroup::nthreads(group_hdl());
1451 ngroups = java_lang_ThreadGroup::ngroups(group_hdl());
1452
1453 if (nthreads > 0) {
1454 ThreadsListHandle tlh(current_thread);
1455 objArrayOop threads = java_lang_ThreadGroup::threads(group_hdl());
1456 assert(nthreads <= threads->length(), "too many threads");
1457 thread_objs = NEW_RESOURCE_ARRAY(Handle,nthreads);
1458 for (int i = 0, j = 0; i < nthreads; i++) {
1459 oop thread_obj = threads->obj_at(i);
1460 assert(thread_obj != NULL, "thread_obj is NULL");
1461 JavaThread *java_thread = NULL;
1462 jvmtiError err = JvmtiExport::cv_oop_to_JavaThread(tlh.list(), thread_obj, &java_thread);
1463 if (err == JVMTI_ERROR_NONE) {
1464 // Have a valid JavaThread*.
1465 if (java_thread->is_hidden_from_external_view()) {
1466 // Filter out hidden java threads.
1467 hidden_threads++;
1468 continue;
1469 }
1470 } else {
1471 // We couldn't convert thread_obj into a JavaThread*.
1472 if (err == JVMTI_ERROR_INVALID_THREAD) {
1473 // The thread_obj does not refer to a java.lang.Thread object
1474 // so skip it.
1475 hidden_threads++;
1476 continue;
1477 }
1478 // We have a valid thread_obj, but no JavaThread*; the caller
1479 // can still have limited use for the thread_obj.
1480 }
1481 thread_objs[j++] = Handle(current_thread, thread_obj);
1482 }
1483 nthreads -= hidden_threads;
1484 } // ThreadsListHandle is destroyed here.
1485
1486 if (ngroups > 0) {
1487 objArrayOop groups = java_lang_ThreadGroup::groups(group_hdl());
1488 assert(ngroups <= groups->length(), "too many groups");
1489 group_objs = NEW_RESOURCE_ARRAY(Handle,ngroups);
1490 for (int i = 0; i < ngroups; i++) {
1491 oop group_obj = groups->obj_at(i);
1492 assert(group_obj != NULL, "group_obj != NULL");
1493 group_objs[i] = Handle(current_thread, group_obj);
1494 }
1495 }
1496 } // ThreadGroup unlocked here
1497
1498 *group_count_ptr = ngroups;
1499 *thread_count_ptr = nthreads;
1500 *threads_ptr = new_jthreadArray(nthreads, thread_objs);
1501 *groups_ptr = new_jthreadGroupArray(ngroups, group_objs);
1502 if ((nthreads > 0) && (*threads_ptr == NULL)) {
1503 return JVMTI_ERROR_OUT_OF_MEMORY;
1504 }
1505 if ((ngroups > 0) && (*groups_ptr == NULL)) {
1506 return JVMTI_ERROR_OUT_OF_MEMORY;
1507 }
1508
1509 return JVMTI_ERROR_NONE;
1510 } /* end GetThreadGroupChildren */
1511
1512
1513 //
1514 // Stack Frame functions
1515 //
1516
1517 // Threads_lock NOT held, java_thread not protected by lock
1518 // java_thread - pre-checked
1519 // max_frame_count - pre-checked to be greater than or equal to 0
1520 // frame_buffer - pre-checked for NULL
1521 // count_ptr - pre-checked for NULL
1522 jvmtiError
1523 JvmtiEnv::GetStackTrace(JavaThread* java_thread, jint start_depth, jint max_frame_count, jvmtiFrameInfo* frame_buffer, jint* count_ptr) {
1524 jvmtiError err = JVMTI_ERROR_NONE;
1525
1526 // It is only safe to perform the direct operation on the current
1527 // thread. All other usage needs to use a vm-safepoint-op for safety.
1528 if (java_thread == JavaThread::current()) {
1529 err = get_stack_trace(java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1530 } else {
1531 // JVMTI get stack trace at safepoint. Do not require target thread to
1532 // be suspended.
1533 VM_GetStackTrace op(this, java_thread, start_depth, max_frame_count, frame_buffer, count_ptr);
1534 VMThread::execute(&op);
1535 err = op.result();
1536 }
1537
1538 return err;
1539 } /* end GetStackTrace */
1540
1541
1542 // max_frame_count - pre-checked to be greater than or equal to 0
1543 // stack_info_ptr - pre-checked for NULL
1544 // thread_count_ptr - pre-checked for NULL
1545 jvmtiError
1546 JvmtiEnv::GetAllStackTraces(jint max_frame_count, jvmtiStackInfo** stack_info_ptr, jint* thread_count_ptr) {
1547 jvmtiError err = JVMTI_ERROR_NONE;
1548 JavaThread* calling_thread = JavaThread::current();
1549
1550 // JVMTI get stack traces at safepoint.
1551 VM_GetAllStackTraces op(this, calling_thread, max_frame_count);
1552 VMThread::execute(&op);
1553 *thread_count_ptr = op.final_thread_count();
1554 *stack_info_ptr = op.stack_info();
1555 err = op.result();
1556 return err;
1557 } /* end GetAllStackTraces */
1558
1559
1560 // thread_count - pre-checked to be greater than or equal to 0
1561 // thread_list - pre-checked for NULL
1562 // max_frame_count - pre-checked to be greater than or equal to 0
1563 // stack_info_ptr - pre-checked for NULL
1564 jvmtiError
1565 JvmtiEnv::GetThreadListStackTraces(jint thread_count, const jthread* thread_list, jint max_frame_count, jvmtiStackInfo** stack_info_ptr) {
1566 jvmtiError err = JVMTI_ERROR_NONE;
1567 // JVMTI get stack traces at safepoint.
1568 VM_GetThreadListStackTraces op(this, thread_count, thread_list, max_frame_count);
1569 VMThread::execute(&op);
1570 err = op.result();
1571 if (err == JVMTI_ERROR_NONE) {
1572 *stack_info_ptr = op.stack_info();
1573 }
1574 return err;
1575 } /* end GetThreadListStackTraces */
1576
1577
1578 // Threads_lock NOT held, java_thread not protected by lock
1579 // java_thread - pre-checked
1580 // count_ptr - pre-checked for NULL
1581 jvmtiError
1582 JvmtiEnv::GetFrameCount(JavaThread* java_thread, jint* count_ptr) {
1583 jvmtiError err = JVMTI_ERROR_NONE;
1584
1585 // retrieve or create JvmtiThreadState.
1586 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1587 if (state == NULL) {
1588 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1589 }
1590
1591 // It is only safe to perform the direct operation on the current
1592 // thread. All other usage needs to use a vm-safepoint-op for safety.
1593 if (java_thread == JavaThread::current()) {
1594 err = get_frame_count(state, count_ptr);
1595 } else {
1596 // get java stack frame count at safepoint.
1597 VM_GetFrameCount op(this, state, count_ptr);
1598 VMThread::execute(&op);
1599 err = op.result();
1600 }
1601 return err;
1602 } /* end GetFrameCount */
1603
1604
1605 // Threads_lock NOT held, java_thread not protected by lock
1606 // java_thread - pre-checked
1607 jvmtiError
1608 JvmtiEnv::PopFrame(JavaThread* java_thread) {
1609 JavaThread* current_thread = JavaThread::current();
1610 HandleMark hm(current_thread);
1611 uint32_t debug_bits = 0;
1612
1613 // retrieve or create the state
1614 JvmtiThreadState* state = JvmtiThreadState::state_for(java_thread);
1615 if (state == NULL) {
1616 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1617 }
1618
1619 // Check if java_thread is fully suspended
1620 if (!java_thread->is_thread_fully_suspended(true /* wait for suspend completion */, &debug_bits)) {
1621 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1622 }
1623 // Check to see if a PopFrame was already in progress
1624 if (java_thread->popframe_condition() != JavaThread::popframe_inactive) {
1625 // Probably possible for JVMTI clients to trigger this, but the
1626 // JPDA backend shouldn't allow this to happen
1627 return JVMTI_ERROR_INTERNAL;
1628 }
1629
1630 {
1631 // Was workaround bug
1632 // 4812902: popFrame hangs if the method is waiting at a synchronize
1633 // Catch this condition and return an error to avoid hanging.
1634 // Now JVMTI spec allows an implementation to bail out with an opaque frame error.
1635 OSThread* osThread = java_thread->osthread();
1636 if (osThread->get_state() == MONITOR_WAIT) {
1637 return JVMTI_ERROR_OPAQUE_FRAME;
1638 }
1639 }
1640
1641 {
1642 ResourceMark rm(current_thread);
1643 // Check if there are more than one Java frame in this thread, that the top two frames
1644 // are Java (not native) frames, and that there is no intervening VM frame
1645 int frame_count = 0;
1646 bool is_interpreted[2];
1647 intptr_t *frame_sp[2];
1648 // The 2-nd arg of constructor is needed to stop iterating at java entry frame.
1649 for (vframeStream vfs(java_thread, true); !vfs.at_end(); vfs.next()) {
1650 methodHandle mh(current_thread, vfs.method());
1651 if (mh->is_native()) return(JVMTI_ERROR_OPAQUE_FRAME);
1652 is_interpreted[frame_count] = vfs.is_interpreted_frame();
1653 frame_sp[frame_count] = vfs.frame_id();
1654 if (++frame_count > 1) break;
1655 }
1656 if (frame_count < 2) {
1657 // We haven't found two adjacent non-native Java frames on the top.
1658 // There can be two situations here:
1659 // 1. There are no more java frames
1660 // 2. Two top java frames are separated by non-java native frames
1661 if(vframeFor(java_thread, 1) == NULL) {
1662 return JVMTI_ERROR_NO_MORE_FRAMES;
1663 } else {
1664 // Intervening non-java native or VM frames separate java frames.
1665 // Current implementation does not support this. See bug #5031735.
1666 // In theory it is possible to pop frames in such cases.
1667 return JVMTI_ERROR_OPAQUE_FRAME;
1668 }
1669 }
1670
1671 // If any of the top 2 frames is a compiled one, need to deoptimize it
1672 for (int i = 0; i < 2; i++) {
1673 if (!is_interpreted[i]) {
1674 Deoptimization::deoptimize_frame(java_thread, frame_sp[i]);
1675 }
1676 }
1677
1678 // Update the thread state to reflect that the top frame is popped
1679 // so that cur_stack_depth is maintained properly and all frameIDs
1680 // are invalidated.
1681 // The current frame will be popped later when the suspended thread
1682 // is resumed and right before returning from VM to Java.
1683 // (see call_VM_base() in assembler_<cpu>.cpp).
1684
1685 // It's fine to update the thread state here because no JVMTI events
1686 // shall be posted for this PopFrame.
1687
1688 // It is only safe to perform the direct operation on the current
1689 // thread. All other usage needs to use a vm-safepoint-op for safety.
1690 if (java_thread == JavaThread::current()) {
1691 state->update_for_pop_top_frame();
1692 } else {
1693 VM_UpdateForPopTopFrame op(state);
1694 VMThread::execute(&op);
1695 jvmtiError err = op.result();
1696 if (err != JVMTI_ERROR_NONE) {
1697 return err;
1698 }
1699 }
1700
1701 java_thread->set_popframe_condition(JavaThread::popframe_pending_bit);
1702 // Set pending step flag for this popframe and it is cleared when next
1703 // step event is posted.
1704 state->set_pending_step_for_popframe();
1705 }
1706
1707 return JVMTI_ERROR_NONE;
1708 } /* end PopFrame */
1709
1710
1711 // Threads_lock NOT held, java_thread not protected by lock
1712 // java_thread - pre-checked
1713 // java_thread - unchecked
1714 // depth - pre-checked as non-negative
1715 // method_ptr - pre-checked for NULL
1716 // location_ptr - pre-checked for NULL
1717 jvmtiError
1718 JvmtiEnv::GetFrameLocation(JavaThread* java_thread, jint depth, jmethodID* method_ptr, jlocation* location_ptr) {
1719 jvmtiError err = JVMTI_ERROR_NONE;
1720
1721 // It is only safe to perform the direct operation on the current
1722 // thread. All other usage needs to use a vm-safepoint-op for safety.
1723 if (java_thread == JavaThread::current()) {
1724 err = get_frame_location(java_thread, depth, method_ptr, location_ptr);
1725 } else {
1726 // JVMTI get java stack frame location at safepoint.
1727 VM_GetFrameLocation op(this, java_thread, depth, method_ptr, location_ptr);
1728 VMThread::execute(&op);
1729 err = op.result();
1730 }
1731 return err;
1732 } /* end GetFrameLocation */
1733
1734
1735 // Threads_lock NOT held, java_thread not protected by lock
1736 // java_thread - pre-checked
1737 // java_thread - unchecked
1738 // depth - pre-checked as non-negative
1739 jvmtiError
1740 JvmtiEnv::NotifyFramePop(JavaThread* java_thread, jint depth) {
1741 jvmtiError err = JVMTI_ERROR_NONE;
1742 ResourceMark rm;
1743 uint32_t debug_bits = 0;
1744
1745 JvmtiThreadState *state = JvmtiThreadState::state_for(java_thread);
1746 if (state == NULL) {
1747 return JVMTI_ERROR_THREAD_NOT_ALIVE;
1748 }
1749
1750 if (!java_thread->is_thread_fully_suspended(true, &debug_bits)) {
1751 return JVMTI_ERROR_THREAD_NOT_SUSPENDED;
1752 }
1753
1754 if (TraceJVMTICalls) {
1755 JvmtiSuspendControl::print();
1756 }
1757
1758 vframe *vf = vframeFor(java_thread, depth);
1759 if (vf == NULL) {
1760 return JVMTI_ERROR_NO_MORE_FRAMES;
1761 }
1762
1763 if (!vf->is_java_frame() || ((javaVFrame*) vf)->method()->is_native()) {
1764 return JVMTI_ERROR_OPAQUE_FRAME;
1765 }
1766
1767 assert(vf->frame_pointer() != NULL, "frame pointer mustn't be NULL");
1768
1769 // It is only safe to perform the direct operation on the current
1770 // thread. All other usage needs to use a vm-safepoint-op for safety.
1771 if (java_thread == JavaThread::current()) {
1772 int frame_number = state->count_frames() - depth;
1773 state->env_thread_state(this)->set_frame_pop(frame_number);
1774 } else {
1775 VM_SetFramePop op(this, state, depth);
1776 VMThread::execute(&op);
1777 err = op.result();
1778 }
1779 return err;
1780 } /* end NotifyFramePop */
1781
1782
1783 //
1784 // Force Early Return functions
1785 //
1786
1787 // Threads_lock NOT held, java_thread not protected by lock
1788 // java_thread - pre-checked
1789 jvmtiError
1790 JvmtiEnv::ForceEarlyReturnObject(JavaThread* java_thread, jobject value) {
1791 jvalue val;
1792 val.l = value;
1793 return force_early_return(java_thread, val, atos);
1794 } /* end ForceEarlyReturnObject */
1795
1796
1797 // Threads_lock NOT held, java_thread not protected by lock
1798 // java_thread - pre-checked
1799 jvmtiError
1800 JvmtiEnv::ForceEarlyReturnInt(JavaThread* java_thread, jint value) {
1801 jvalue val;
1802 val.i = value;
1803 return force_early_return(java_thread, val, itos);
1804 } /* end ForceEarlyReturnInt */
1805
1806
1807 // Threads_lock NOT held, java_thread not protected by lock
1808 // java_thread - pre-checked
1809 jvmtiError
1810 JvmtiEnv::ForceEarlyReturnLong(JavaThread* java_thread, jlong value) {
1811 jvalue val;
1812 val.j = value;
1813 return force_early_return(java_thread, val, ltos);
1814 } /* end ForceEarlyReturnLong */
1815
1816
1817 // Threads_lock NOT held, java_thread not protected by lock
1818 // java_thread - pre-checked
1819 jvmtiError
1820 JvmtiEnv::ForceEarlyReturnFloat(JavaThread* java_thread, jfloat value) {
1821 jvalue val;
1822 val.f = value;
1823 return force_early_return(java_thread, val, ftos);
1824 } /* end ForceEarlyReturnFloat */
1825
1826
1827 // Threads_lock NOT held, java_thread not protected by lock
1828 // java_thread - pre-checked
1829 jvmtiError
1830 JvmtiEnv::ForceEarlyReturnDouble(JavaThread* java_thread, jdouble value) {
1831 jvalue val;
1832 val.d = value;
1833 return force_early_return(java_thread, val, dtos);
1834 } /* end ForceEarlyReturnDouble */
1835
1836
1837 // Threads_lock NOT held, java_thread not protected by lock
1838 // java_thread - pre-checked
1839 jvmtiError
1840 JvmtiEnv::ForceEarlyReturnVoid(JavaThread* java_thread) {
1841 jvalue val;
1842 val.j = 0L;
1843 return force_early_return(java_thread, val, vtos);
1844 } /* end ForceEarlyReturnVoid */
1845
1846
1847 //
1848 // Heap functions
1849 //
1850
1851 // klass - NULL is a valid value, must be checked
1852 // initial_object - NULL is a valid value, must be checked
1853 // callbacks - pre-checked for NULL
1854 // user_data - NULL is a valid value, must be checked
1855 jvmtiError
1856 JvmtiEnv::FollowReferences(jint heap_filter, jclass klass, jobject initial_object, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1857 // check klass if provided
1858 Klass* k = NULL;
1859 if (klass != NULL) {
1860 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1861 if (k_mirror == NULL) {
1862 return JVMTI_ERROR_INVALID_CLASS;
1863 }
1864 if (java_lang_Class::is_primitive(k_mirror)) {
1865 return JVMTI_ERROR_NONE;
1866 }
1867 k = java_lang_Class::as_Klass(k_mirror);
1868 if (klass == NULL) {
1869 return JVMTI_ERROR_INVALID_CLASS;
1870 }
1871 }
1872
1873 if (initial_object != NULL) {
1874 oop init_obj = JNIHandles::resolve_external_guard(initial_object);
1875 if (init_obj == NULL) {
1876 return JVMTI_ERROR_INVALID_OBJECT;
1877 }
1878 }
1879
1880 Thread *thread = Thread::current();
1881 HandleMark hm(thread);
1882
1883 TraceTime t("FollowReferences", TRACETIME_LOG(Debug, jvmti, objecttagging));
1884 JvmtiTagMap::tag_map_for(this)->follow_references(heap_filter, k, initial_object, callbacks, user_data);
1885 return JVMTI_ERROR_NONE;
1886 } /* end FollowReferences */
1887
1888
1889 // klass - NULL is a valid value, must be checked
1890 // callbacks - pre-checked for NULL
1891 // user_data - NULL is a valid value, must be checked
1892 jvmtiError
1893 JvmtiEnv::IterateThroughHeap(jint heap_filter, jclass klass, const jvmtiHeapCallbacks* callbacks, const void* user_data) {
1894 // check klass if provided
1895 Klass* k = NULL;
1896 if (klass != NULL) {
1897 oop k_mirror = JNIHandles::resolve_external_guard(klass);
1898 if (k_mirror == NULL) {
1899 return JVMTI_ERROR_INVALID_CLASS;
1900 }
1901 if (java_lang_Class::is_primitive(k_mirror)) {
1902 return JVMTI_ERROR_NONE;
1903 }
1904 k = java_lang_Class::as_Klass(k_mirror);
1905 if (k == NULL) {
1906 return JVMTI_ERROR_INVALID_CLASS;
1907 }
1908 }
1909
1910 TraceTime t("IterateThroughHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1911 JvmtiTagMap::tag_map_for(this)->iterate_through_heap(heap_filter, k, callbacks, user_data);
1912 return JVMTI_ERROR_NONE;
1913 } /* end IterateThroughHeap */
1914
1915
1916 // tag_ptr - pre-checked for NULL
1917 jvmtiError
1918 JvmtiEnv::GetTag(jobject object, jlong* tag_ptr) {
1919 oop o = JNIHandles::resolve_external_guard(object);
1920 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1921 *tag_ptr = JvmtiTagMap::tag_map_for(this)->get_tag(object);
1922 return JVMTI_ERROR_NONE;
1923 } /* end GetTag */
1924
1925
1926 jvmtiError
1927 JvmtiEnv::SetTag(jobject object, jlong tag) {
1928 oop o = JNIHandles::resolve_external_guard(object);
1929 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1930 JvmtiTagMap::tag_map_for(this)->set_tag(object, tag);
1931 return JVMTI_ERROR_NONE;
1932 } /* end SetTag */
1933
1934
1935 // tag_count - pre-checked to be greater than or equal to 0
1936 // tags - pre-checked for NULL
1937 // count_ptr - pre-checked for NULL
1938 // object_result_ptr - NULL is a valid value, must be checked
1939 // tag_result_ptr - NULL is a valid value, must be checked
1940 jvmtiError
1941 JvmtiEnv::GetObjectsWithTags(jint tag_count, const jlong* tags, jint* count_ptr, jobject** object_result_ptr, jlong** tag_result_ptr) {
1942 TraceTime t("GetObjectsWithTags", TRACETIME_LOG(Debug, jvmti, objecttagging));
1943 return JvmtiTagMap::tag_map_for(this)->get_objects_with_tags((jlong*)tags, tag_count, count_ptr, object_result_ptr, tag_result_ptr);
1944 } /* end GetObjectsWithTags */
1945
1946
1947 jvmtiError
1948 JvmtiEnv::ForceGarbageCollection() {
1949 Universe::heap()->collect(GCCause::_jvmti_force_gc);
1950 return JVMTI_ERROR_NONE;
1951 } /* end ForceGarbageCollection */
1952
1953
1954 //
1955 // Heap (1.0) functions
1956 //
1957
1958 // object_reference_callback - pre-checked for NULL
1959 // user_data - NULL is a valid value, must be checked
1960 jvmtiError
1961 JvmtiEnv::IterateOverObjectsReachableFromObject(jobject object, jvmtiObjectReferenceCallback object_reference_callback, const void* user_data) {
1962 oop o = JNIHandles::resolve_external_guard(object);
1963 NULL_CHECK(o, JVMTI_ERROR_INVALID_OBJECT);
1964 JvmtiTagMap::tag_map_for(this)->iterate_over_objects_reachable_from_object(object, object_reference_callback, user_data);
1965 return JVMTI_ERROR_NONE;
1966 } /* end IterateOverObjectsReachableFromObject */
1967
1968
1969 // heap_root_callback - NULL is a valid value, must be checked
1970 // stack_ref_callback - NULL is a valid value, must be checked
1971 // object_ref_callback - NULL is a valid value, must be checked
1972 // user_data - NULL is a valid value, must be checked
1973 jvmtiError
1974 JvmtiEnv::IterateOverReachableObjects(jvmtiHeapRootCallback heap_root_callback, jvmtiStackReferenceCallback stack_ref_callback, jvmtiObjectReferenceCallback object_ref_callback, const void* user_data) {
1975 TraceTime t("IterateOverReachableObjects", TRACETIME_LOG(Debug, jvmti, objecttagging));
1976 JvmtiTagMap::tag_map_for(this)->iterate_over_reachable_objects(heap_root_callback, stack_ref_callback, object_ref_callback, user_data);
1977 return JVMTI_ERROR_NONE;
1978 } /* end IterateOverReachableObjects */
1979
1980
1981 // heap_object_callback - pre-checked for NULL
1982 // user_data - NULL is a valid value, must be checked
1983 jvmtiError
1984 JvmtiEnv::IterateOverHeap(jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1985 TraceTime t("IterateOverHeap", TRACETIME_LOG(Debug, jvmti, objecttagging));
1986 Thread *thread = Thread::current();
1987 HandleMark hm(thread);
1988 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, NULL, heap_object_callback, user_data);
1989 return JVMTI_ERROR_NONE;
1990 } /* end IterateOverHeap */
1991
1992
1993 // k_mirror - may be primitive, this must be checked
1994 // heap_object_callback - pre-checked for NULL
1995 // user_data - NULL is a valid value, must be checked
1996 jvmtiError
1997 JvmtiEnv::IterateOverInstancesOfClass(oop k_mirror, jvmtiHeapObjectFilter object_filter, jvmtiHeapObjectCallback heap_object_callback, const void* user_data) {
1998 if (java_lang_Class::is_primitive(k_mirror)) {
1999 // DO PRIMITIVE CLASS PROCESSING
2000 return JVMTI_ERROR_NONE;
2001 }
2002 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2003 if (klass == NULL) {
2004 return JVMTI_ERROR_INVALID_CLASS;
2005 }
2006 TraceTime t("IterateOverInstancesOfClass", TRACETIME_LOG(Debug, jvmti, objecttagging));
2007 JvmtiTagMap::tag_map_for(this)->iterate_over_heap(object_filter, klass, heap_object_callback, user_data);
2008 return JVMTI_ERROR_NONE;
2009 } /* end IterateOverInstancesOfClass */
2010
2011
2012 //
2013 // Local Variable functions
2014 //
2015
2016 // Threads_lock NOT held, java_thread not protected by lock
2017 // java_thread - pre-checked
2018 // java_thread - unchecked
2019 // depth - pre-checked as non-negative
2020 // value_ptr - pre-checked for NULL
2021 jvmtiError
2022 JvmtiEnv::GetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject* value_ptr) {
2023 JavaThread* current_thread = JavaThread::current();
2024 // rm object is created to clean up the javaVFrame created in
2025 // doit_prologue(), but after doit() is finished with it.
2026 ResourceMark rm(current_thread);
2027
2028 VM_GetOrSetLocal op(java_thread, current_thread, depth, slot);
2029 VMThread::execute(&op);
2030 jvmtiError err = op.result();
2031 if (err != JVMTI_ERROR_NONE) {
2032 return err;
2033 } else {
2034 *value_ptr = op.value().l;
2035 return JVMTI_ERROR_NONE;
2036 }
2037 } /* end GetLocalObject */
2038
2039 // Threads_lock NOT held, java_thread not protected by lock
2040 // java_thread - pre-checked
2041 // java_thread - unchecked
2042 // depth - pre-checked as non-negative
2043 // value - pre-checked for NULL
2044 jvmtiError
2045 JvmtiEnv::GetLocalInstance(JavaThread* java_thread, jint depth, jobject* value_ptr){
2046 JavaThread* current_thread = JavaThread::current();
2047 // rm object is created to clean up the javaVFrame created in
2048 // doit_prologue(), but after doit() is finished with it.
2049 ResourceMark rm(current_thread);
2050
2051 VM_GetReceiver op(java_thread, current_thread, depth);
2052 VMThread::execute(&op);
2053 jvmtiError err = op.result();
2054 if (err != JVMTI_ERROR_NONE) {
2055 return err;
2056 } else {
2057 *value_ptr = op.value().l;
2058 return JVMTI_ERROR_NONE;
2059 }
2060 } /* end GetLocalInstance */
2061
2062
2063 // Threads_lock NOT held, java_thread not protected by lock
2064 // java_thread - pre-checked
2065 // java_thread - unchecked
2066 // depth - pre-checked as non-negative
2067 // value_ptr - pre-checked for NULL
2068 jvmtiError
2069 JvmtiEnv::GetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint* value_ptr) {
2070 // rm object is created to clean up the javaVFrame created in
2071 // doit_prologue(), but after doit() is finished with it.
2072 ResourceMark rm;
2073
2074 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT);
2075 VMThread::execute(&op);
2076 *value_ptr = op.value().i;
2077 return op.result();
2078 } /* end GetLocalInt */
2079
2080
2081 // Threads_lock NOT held, java_thread not protected by lock
2082 // java_thread - pre-checked
2083 // java_thread - unchecked
2084 // depth - pre-checked as non-negative
2085 // value_ptr - pre-checked for NULL
2086 jvmtiError
2087 JvmtiEnv::GetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong* value_ptr) {
2088 // rm object is created to clean up the javaVFrame created in
2089 // doit_prologue(), but after doit() is finished with it.
2090 ResourceMark rm;
2091
2092 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG);
2093 VMThread::execute(&op);
2094 *value_ptr = op.value().j;
2095 return op.result();
2096 } /* end GetLocalLong */
2097
2098
2099 // Threads_lock NOT held, java_thread not protected by lock
2100 // java_thread - pre-checked
2101 // java_thread - unchecked
2102 // depth - pre-checked as non-negative
2103 // value_ptr - pre-checked for NULL
2104 jvmtiError
2105 JvmtiEnv::GetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat* value_ptr) {
2106 // rm object is created to clean up the javaVFrame created in
2107 // doit_prologue(), but after doit() is finished with it.
2108 ResourceMark rm;
2109
2110 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT);
2111 VMThread::execute(&op);
2112 *value_ptr = op.value().f;
2113 return op.result();
2114 } /* end GetLocalFloat */
2115
2116
2117 // Threads_lock NOT held, java_thread not protected by lock
2118 // java_thread - pre-checked
2119 // java_thread - unchecked
2120 // depth - pre-checked as non-negative
2121 // value_ptr - pre-checked for NULL
2122 jvmtiError
2123 JvmtiEnv::GetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble* value_ptr) {
2124 // rm object is created to clean up the javaVFrame created in
2125 // doit_prologue(), but after doit() is finished with it.
2126 ResourceMark rm;
2127
2128 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE);
2129 VMThread::execute(&op);
2130 *value_ptr = op.value().d;
2131 return op.result();
2132 } /* end GetLocalDouble */
2133
2134
2135 // Threads_lock NOT held, java_thread not protected by lock
2136 // java_thread - pre-checked
2137 // java_thread - unchecked
2138 // depth - pre-checked as non-negative
2139 jvmtiError
2140 JvmtiEnv::SetLocalObject(JavaThread* java_thread, jint depth, jint slot, jobject value) {
2141 // rm object is created to clean up the javaVFrame created in
2142 // doit_prologue(), but after doit() is finished with it.
2143 ResourceMark rm;
2144 jvalue val;
2145 val.l = value;
2146 VM_GetOrSetLocal op(java_thread, depth, slot, T_OBJECT, val);
2147 VMThread::execute(&op);
2148 return op.result();
2149 } /* end SetLocalObject */
2150
2151
2152 // Threads_lock NOT held, java_thread not protected by lock
2153 // java_thread - pre-checked
2154 // java_thread - unchecked
2155 // depth - pre-checked as non-negative
2156 jvmtiError
2157 JvmtiEnv::SetLocalInt(JavaThread* java_thread, jint depth, jint slot, jint value) {
2158 // rm object is created to clean up the javaVFrame created in
2159 // doit_prologue(), but after doit() is finished with it.
2160 ResourceMark rm;
2161 jvalue val;
2162 val.i = value;
2163 VM_GetOrSetLocal op(java_thread, depth, slot, T_INT, val);
2164 VMThread::execute(&op);
2165 return op.result();
2166 } /* end SetLocalInt */
2167
2168
2169 // Threads_lock NOT held, java_thread not protected by lock
2170 // java_thread - pre-checked
2171 // java_thread - unchecked
2172 // depth - pre-checked as non-negative
2173 jvmtiError
2174 JvmtiEnv::SetLocalLong(JavaThread* java_thread, jint depth, jint slot, jlong value) {
2175 // rm object is created to clean up the javaVFrame created in
2176 // doit_prologue(), but after doit() is finished with it.
2177 ResourceMark rm;
2178 jvalue val;
2179 val.j = value;
2180 VM_GetOrSetLocal op(java_thread, depth, slot, T_LONG, val);
2181 VMThread::execute(&op);
2182 return op.result();
2183 } /* end SetLocalLong */
2184
2185
2186 // Threads_lock NOT held, java_thread not protected by lock
2187 // java_thread - pre-checked
2188 // java_thread - unchecked
2189 // depth - pre-checked as non-negative
2190 jvmtiError
2191 JvmtiEnv::SetLocalFloat(JavaThread* java_thread, jint depth, jint slot, jfloat value) {
2192 // rm object is created to clean up the javaVFrame created in
2193 // doit_prologue(), but after doit() is finished with it.
2194 ResourceMark rm;
2195 jvalue val;
2196 val.f = value;
2197 VM_GetOrSetLocal op(java_thread, depth, slot, T_FLOAT, val);
2198 VMThread::execute(&op);
2199 return op.result();
2200 } /* end SetLocalFloat */
2201
2202
2203 // Threads_lock NOT held, java_thread not protected by lock
2204 // java_thread - pre-checked
2205 // java_thread - unchecked
2206 // depth - pre-checked as non-negative
2207 jvmtiError
2208 JvmtiEnv::SetLocalDouble(JavaThread* java_thread, jint depth, jint slot, jdouble value) {
2209 // rm object is created to clean up the javaVFrame created in
2210 // doit_prologue(), but after doit() is finished with it.
2211 ResourceMark rm;
2212 jvalue val;
2213 val.d = value;
2214 VM_GetOrSetLocal op(java_thread, depth, slot, T_DOUBLE, val);
2215 VMThread::execute(&op);
2216 return op.result();
2217 } /* end SetLocalDouble */
2218
2219
2220 //
2221 // Breakpoint functions
2222 //
2223
2224 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2225 jvmtiError
2226 JvmtiEnv::SetBreakpoint(Method* method_oop, jlocation location) {
2227 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2228 if (location < 0) { // simple invalid location check first
2229 return JVMTI_ERROR_INVALID_LOCATION;
2230 }
2231 // verify that the breakpoint is not past the end of the method
2232 if (location >= (jlocation) method_oop->code_size()) {
2233 return JVMTI_ERROR_INVALID_LOCATION;
2234 }
2235
2236 ResourceMark rm;
2237 JvmtiBreakpoint bp(method_oop, location);
2238 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2239 if (jvmti_breakpoints.set(bp) == JVMTI_ERROR_DUPLICATE)
2240 return JVMTI_ERROR_DUPLICATE;
2241
2242 if (TraceJVMTICalls) {
2243 jvmti_breakpoints.print();
2244 }
2245
2246 return JVMTI_ERROR_NONE;
2247 } /* end SetBreakpoint */
2248
2249
2250 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2251 jvmtiError
2252 JvmtiEnv::ClearBreakpoint(Method* method_oop, jlocation location) {
2253 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2254
2255 if (location < 0) { // simple invalid location check first
2256 return JVMTI_ERROR_INVALID_LOCATION;
2257 }
2258
2259 // verify that the breakpoint is not past the end of the method
2260 if (location >= (jlocation) method_oop->code_size()) {
2261 return JVMTI_ERROR_INVALID_LOCATION;
2262 }
2263
2264 JvmtiBreakpoint bp(method_oop, location);
2265
2266 JvmtiBreakpoints& jvmti_breakpoints = JvmtiCurrentBreakpoints::get_jvmti_breakpoints();
2267 if (jvmti_breakpoints.clear(bp) == JVMTI_ERROR_NOT_FOUND)
2268 return JVMTI_ERROR_NOT_FOUND;
2269
2270 if (TraceJVMTICalls) {
2271 jvmti_breakpoints.print();
2272 }
2273
2274 return JVMTI_ERROR_NONE;
2275 } /* end ClearBreakpoint */
2276
2277
2278 //
2279 // Watched Field functions
2280 //
2281
2282 jvmtiError
2283 JvmtiEnv::SetFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2284 // make sure we haven't set this watch before
2285 if (fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_DUPLICATE;
2286 fdesc_ptr->set_is_field_access_watched(true);
2287
2288 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, true);
2289
2290 return JVMTI_ERROR_NONE;
2291 } /* end SetFieldAccessWatch */
2292
2293
2294 jvmtiError
2295 JvmtiEnv::ClearFieldAccessWatch(fieldDescriptor* fdesc_ptr) {
2296 // make sure we have a watch to clear
2297 if (!fdesc_ptr->is_field_access_watched()) return JVMTI_ERROR_NOT_FOUND;
2298 fdesc_ptr->set_is_field_access_watched(false);
2299
2300 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_ACCESS, false);
2301
2302 return JVMTI_ERROR_NONE;
2303 } /* end ClearFieldAccessWatch */
2304
2305
2306 jvmtiError
2307 JvmtiEnv::SetFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2308 // make sure we haven't set this watch before
2309 if (fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_DUPLICATE;
2310 fdesc_ptr->set_is_field_modification_watched(true);
2311
2312 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, true);
2313
2314 return JVMTI_ERROR_NONE;
2315 } /* end SetFieldModificationWatch */
2316
2317
2318 jvmtiError
2319 JvmtiEnv::ClearFieldModificationWatch(fieldDescriptor* fdesc_ptr) {
2320 // make sure we have a watch to clear
2321 if (!fdesc_ptr->is_field_modification_watched()) return JVMTI_ERROR_NOT_FOUND;
2322 fdesc_ptr->set_is_field_modification_watched(false);
2323
2324 JvmtiEventController::change_field_watch(JVMTI_EVENT_FIELD_MODIFICATION, false);
2325
2326 return JVMTI_ERROR_NONE;
2327 } /* end ClearFieldModificationWatch */
2328
2329 //
2330 // Class functions
2331 //
2332
2333
2334 // k_mirror - may be primitive, this must be checked
2335 // signature_ptr - NULL is a valid value, must be checked
2336 // generic_ptr - NULL is a valid value, must be checked
2337 jvmtiError
2338 JvmtiEnv::GetClassSignature(oop k_mirror, char** signature_ptr, char** generic_ptr) {
2339 ResourceMark rm;
2340 bool isPrimitive = java_lang_Class::is_primitive(k_mirror);
2341 Klass* k = NULL;
2342 if (!isPrimitive) {
2343 k = java_lang_Class::as_Klass(k_mirror);
2344 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2345 }
2346 if (signature_ptr != NULL) {
2347 char* result = NULL;
2348 if (isPrimitive) {
2349 char tchar = type2char(java_lang_Class::primitive_type(k_mirror));
2350 result = (char*) jvmtiMalloc(2);
2351 result[0] = tchar;
2352 result[1] = '\0';
2353 } else {
2354 const char* class_sig = k->signature_name();
2355 result = (char *) jvmtiMalloc(strlen(class_sig)+1);
2356 strcpy(result, class_sig);
2357 }
2358 *signature_ptr = result;
2359 }
2360 if (generic_ptr != NULL) {
2361 *generic_ptr = NULL;
2362 if (!isPrimitive && k->is_instance_klass()) {
2363 Symbol* soo = InstanceKlass::cast(k)->generic_signature();
2364 if (soo != NULL) {
2365 const char *gen_sig = soo->as_C_string();
2366 if (gen_sig != NULL) {
2367 char* gen_result;
2368 jvmtiError err = allocate(strlen(gen_sig) + 1,
2369 (unsigned char **)&gen_result);
2370 if (err != JVMTI_ERROR_NONE) {
2371 return err;
2372 }
2373 strcpy(gen_result, gen_sig);
2374 *generic_ptr = gen_result;
2375 }
2376 }
2377 }
2378 }
2379 return JVMTI_ERROR_NONE;
2380 } /* end GetClassSignature */
2381
2382
2383 // k_mirror - may be primitive, this must be checked
2384 // status_ptr - pre-checked for NULL
2385 jvmtiError
2386 JvmtiEnv::GetClassStatus(oop k_mirror, jint* status_ptr) {
2387 jint result = 0;
2388 if (java_lang_Class::is_primitive(k_mirror)) {
2389 result |= JVMTI_CLASS_STATUS_PRIMITIVE;
2390 } else {
2391 Klass* k = java_lang_Class::as_Klass(k_mirror);
2392 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2393 result = k->jvmti_class_status();
2394 }
2395 *status_ptr = result;
2396
2397 return JVMTI_ERROR_NONE;
2398 } /* end GetClassStatus */
2399
2400
2401 // k_mirror - may be primitive, this must be checked
2402 // source_name_ptr - pre-checked for NULL
2403 jvmtiError
2404 JvmtiEnv::GetSourceFileName(oop k_mirror, char** source_name_ptr) {
2405 if (java_lang_Class::is_primitive(k_mirror)) {
2406 return JVMTI_ERROR_ABSENT_INFORMATION;
2407 }
2408 Klass* k_klass = java_lang_Class::as_Klass(k_mirror);
2409 NULL_CHECK(k_klass, JVMTI_ERROR_INVALID_CLASS);
2410
2411 if (!k_klass->is_instance_klass()) {
2412 return JVMTI_ERROR_ABSENT_INFORMATION;
2413 }
2414
2415 Symbol* sfnOop = InstanceKlass::cast(k_klass)->source_file_name();
2416 NULL_CHECK(sfnOop, JVMTI_ERROR_ABSENT_INFORMATION);
2417 {
2418 JavaThread* current_thread = JavaThread::current();
2419 ResourceMark rm(current_thread);
2420 const char* sfncp = (const char*) sfnOop->as_C_string();
2421 *source_name_ptr = (char *) jvmtiMalloc(strlen(sfncp)+1);
2422 strcpy(*source_name_ptr, sfncp);
2423 }
2424
2425 return JVMTI_ERROR_NONE;
2426 } /* end GetSourceFileName */
2427
2428
2429 // k_mirror - may be primitive, this must be checked
2430 // modifiers_ptr - pre-checked for NULL
2431 jvmtiError
2432 JvmtiEnv::GetClassModifiers(oop k_mirror, jint* modifiers_ptr) {
2433 JavaThread* current_thread = JavaThread::current();
2434 jint result = 0;
2435 if (!java_lang_Class::is_primitive(k_mirror)) {
2436 Klass* k = java_lang_Class::as_Klass(k_mirror);
2437 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2438 result = k->compute_modifier_flags(current_thread);
2439 JavaThread* THREAD = current_thread; // pass to macros
2440 if (HAS_PENDING_EXCEPTION) {
2441 CLEAR_PENDING_EXCEPTION;
2442 return JVMTI_ERROR_INTERNAL;
2443 };
2444
2445 // Reset the deleted ACC_SUPER bit ( deleted in compute_modifier_flags()).
2446 if(k->is_super()) {
2447 result |= JVM_ACC_SUPER;
2448 }
2449 } else {
2450 result = (JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
2451 }
2452 *modifiers_ptr = result;
2453
2454 return JVMTI_ERROR_NONE;
2455 } /* end GetClassModifiers */
2456
2457
2458 // k_mirror - may be primitive, this must be checked
2459 // method_count_ptr - pre-checked for NULL
2460 // methods_ptr - pre-checked for NULL
2461 jvmtiError
2462 JvmtiEnv::GetClassMethods(oop k_mirror, jint* method_count_ptr, jmethodID** methods_ptr) {
2463 JavaThread* current_thread = JavaThread::current();
2464 HandleMark hm(current_thread);
2465
2466 if (java_lang_Class::is_primitive(k_mirror)) {
2467 *method_count_ptr = 0;
2468 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2469 return JVMTI_ERROR_NONE;
2470 }
2471 Klass* k = java_lang_Class::as_Klass(k_mirror);
2472 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2473
2474 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2475 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2476 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2477 }
2478
2479 if (!k->is_instance_klass()) {
2480 *method_count_ptr = 0;
2481 *methods_ptr = (jmethodID*) jvmtiMalloc(0 * sizeof(jmethodID));
2482 return JVMTI_ERROR_NONE;
2483 }
2484 InstanceKlass* ik = InstanceKlass::cast(k);
2485 // Allocate the result and fill it in
2486 int result_length = ik->methods()->length();
2487 jmethodID* result_list = (jmethodID*)jvmtiMalloc(result_length * sizeof(jmethodID));
2488 int index;
2489 bool jmethodids_found = true;
2490
2491 if (JvmtiExport::can_maintain_original_method_order()) {
2492 // Use the original method ordering indices stored in the class, so we can emit
2493 // jmethodIDs in the order they appeared in the class file
2494 for (index = 0; index < result_length; index++) {
2495 Method* m = ik->methods()->at(index);
2496 int original_index = ik->method_ordering()->at(index);
2497 assert(original_index >= 0 && original_index < result_length, "invalid original method index");
2498 jmethodID id;
2499 if (jmethodids_found) {
2500 id = m->find_jmethod_id_or_null();
2501 if (id == NULL) {
2502 // If we find an uninitialized value, make sure there is
2503 // enough space for all the uninitialized values we might
2504 // find.
2505 ik->ensure_space_for_methodids(index);
2506 jmethodids_found = false;
2507 id = m->jmethod_id();
2508 }
2509 } else {
2510 id = m->jmethod_id();
2511 }
2512 result_list[original_index] = id;
2513 }
2514 } else {
2515 // otherwise just copy in any order
2516 for (index = 0; index < result_length; index++) {
2517 Method* m = ik->methods()->at(index);
2518 jmethodID id;
2519 if (jmethodids_found) {
2520 id = m->find_jmethod_id_or_null();
2521 if (id == NULL) {
2522 // If we find an uninitialized value, make sure there is
2523 // enough space for all the uninitialized values we might
2524 // find.
2525 ik->ensure_space_for_methodids(index);
2526 jmethodids_found = false;
2527 id = m->jmethod_id();
2528 }
2529 } else {
2530 id = m->jmethod_id();
2531 }
2532 result_list[index] = id;
2533 }
2534 }
2535 // Fill in return value.
2536 *method_count_ptr = result_length;
2537 *methods_ptr = result_list;
2538
2539 return JVMTI_ERROR_NONE;
2540 } /* end GetClassMethods */
2541
2542
2543 // k_mirror - may be primitive, this must be checked
2544 // field_count_ptr - pre-checked for NULL
2545 // fields_ptr - pre-checked for NULL
2546 jvmtiError
2547 JvmtiEnv::GetClassFields(oop k_mirror, jint* field_count_ptr, jfieldID** fields_ptr) {
2548 if (java_lang_Class::is_primitive(k_mirror)) {
2549 *field_count_ptr = 0;
2550 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2551 return JVMTI_ERROR_NONE;
2552 }
2553 JavaThread* current_thread = JavaThread::current();
2554 HandleMark hm(current_thread);
2555 Klass* k = java_lang_Class::as_Klass(k_mirror);
2556 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2557
2558 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2559 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) )) {
2560 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2561 }
2562
2563 if (!k->is_instance_klass()) {
2564 *field_count_ptr = 0;
2565 *fields_ptr = (jfieldID*) jvmtiMalloc(0 * sizeof(jfieldID));
2566 return JVMTI_ERROR_NONE;
2567 }
2568
2569
2570 InstanceKlass* ik = InstanceKlass::cast(k);
2571
2572 int result_count = 0;
2573 // First, count the fields.
2574 FilteredFieldStream flds(ik, true, true);
2575 result_count = flds.field_count();
2576
2577 // Allocate the result and fill it in
2578 jfieldID* result_list = (jfieldID*) jvmtiMalloc(result_count * sizeof(jfieldID));
2579 // The JVMTI spec requires fields in the order they occur in the class file,
2580 // this is the reverse order of what FieldStream hands out.
2581 int id_index = (result_count - 1);
2582
2583 for (FilteredFieldStream src_st(ik, true, true); !src_st.eos(); src_st.next()) {
2584 result_list[id_index--] = jfieldIDWorkaround::to_jfieldID(
2585 ik, src_st.offset(),
2586 src_st.access_flags().is_static(),
2587 src_st.field_descriptor().is_flattened());
2588 }
2589 assert(id_index == -1, "just checking");
2590 // Fill in the results
2591 *field_count_ptr = result_count;
2592 *fields_ptr = result_list;
2593
2594 return JVMTI_ERROR_NONE;
2595 } /* end GetClassFields */
2596
2597
2598 // k_mirror - may be primitive, this must be checked
2599 // interface_count_ptr - pre-checked for NULL
2600 // interfaces_ptr - pre-checked for NULL
2601 jvmtiError
2602 JvmtiEnv::GetImplementedInterfaces(oop k_mirror, jint* interface_count_ptr, jclass** interfaces_ptr) {
2603 {
2604 if (java_lang_Class::is_primitive(k_mirror)) {
2605 *interface_count_ptr = 0;
2606 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2607 return JVMTI_ERROR_NONE;
2608 }
2609 JavaThread* current_thread = JavaThread::current();
2610 HandleMark hm(current_thread);
2611 Klass* k = java_lang_Class::as_Klass(k_mirror);
2612 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2613
2614 // Return CLASS_NOT_PREPARED error as per JVMTI spec.
2615 if (!(k->jvmti_class_status() & (JVMTI_CLASS_STATUS_PREPARED|JVMTI_CLASS_STATUS_ARRAY) ))
2616 return JVMTI_ERROR_CLASS_NOT_PREPARED;
2617
2618 if (!k->is_instance_klass()) {
2619 *interface_count_ptr = 0;
2620 *interfaces_ptr = (jclass*) jvmtiMalloc(0 * sizeof(jclass));
2621 return JVMTI_ERROR_NONE;
2622 }
2623
2624 Array<InstanceKlass*>* interface_list = InstanceKlass::cast(k)->local_interfaces();
2625 const int result_length = (interface_list == NULL ? 0 : interface_list->length());
2626 jclass* result_list = (jclass*) jvmtiMalloc(result_length * sizeof(jclass));
2627 for (int i_index = 0; i_index < result_length; i_index += 1) {
2628 InstanceKlass* klass_at = interface_list->at(i_index);
2629 assert(klass_at->is_klass(), "interfaces must be Klass*s");
2630 assert(klass_at->is_interface(), "interfaces must be interfaces");
2631 oop mirror_at = klass_at->java_mirror();
2632 Handle handle_at = Handle(current_thread, mirror_at);
2633 result_list[i_index] = (jclass) jni_reference(handle_at);
2634 }
2635 *interface_count_ptr = result_length;
2636 *interfaces_ptr = result_list;
2637 }
2638
2639 return JVMTI_ERROR_NONE;
2640 } /* end GetImplementedInterfaces */
2641
2642
2643 // k_mirror - may be primitive, this must be checked
2644 // minor_version_ptr - pre-checked for NULL
2645 // major_version_ptr - pre-checked for NULL
2646 jvmtiError
2647 JvmtiEnv::GetClassVersionNumbers(oop k_mirror, jint* minor_version_ptr, jint* major_version_ptr) {
2648 if (java_lang_Class::is_primitive(k_mirror)) {
2649 return JVMTI_ERROR_ABSENT_INFORMATION;
2650 }
2651 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2652
2653 jint status = klass->jvmti_class_status();
2654 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2655 return JVMTI_ERROR_INVALID_CLASS;
2656 }
2657 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2658 return JVMTI_ERROR_ABSENT_INFORMATION;
2659 }
2660
2661 InstanceKlass* ik = InstanceKlass::cast(klass);
2662 *minor_version_ptr = ik->minor_version();
2663 *major_version_ptr = ik->major_version();
2664
2665 return JVMTI_ERROR_NONE;
2666 } /* end GetClassVersionNumbers */
2667
2668
2669 // k_mirror - may be primitive, this must be checked
2670 // constant_pool_count_ptr - pre-checked for NULL
2671 // constant_pool_byte_count_ptr - pre-checked for NULL
2672 // constant_pool_bytes_ptr - pre-checked for NULL
2673 jvmtiError
2674 JvmtiEnv::GetConstantPool(oop k_mirror, jint* constant_pool_count_ptr, jint* constant_pool_byte_count_ptr, unsigned char** constant_pool_bytes_ptr) {
2675 if (java_lang_Class::is_primitive(k_mirror)) {
2676 return JVMTI_ERROR_ABSENT_INFORMATION;
2677 }
2678
2679 Klass* klass = java_lang_Class::as_Klass(k_mirror);
2680 Thread *thread = Thread::current();
2681 ResourceMark rm(thread);
2682
2683 jint status = klass->jvmti_class_status();
2684 if (status & (JVMTI_CLASS_STATUS_ERROR)) {
2685 return JVMTI_ERROR_INVALID_CLASS;
2686 }
2687 if (status & (JVMTI_CLASS_STATUS_ARRAY)) {
2688 return JVMTI_ERROR_ABSENT_INFORMATION;
2689 }
2690
2691 InstanceKlass* ik = InstanceKlass::cast(klass);
2692 JvmtiConstantPoolReconstituter reconstituter(ik);
2693 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2694 return reconstituter.get_error();
2695 }
2696
2697 unsigned char *cpool_bytes;
2698 int cpool_size = reconstituter.cpool_size();
2699 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2700 return reconstituter.get_error();
2701 }
2702 jvmtiError res = allocate(cpool_size, &cpool_bytes);
2703 if (res != JVMTI_ERROR_NONE) {
2704 return res;
2705 }
2706 reconstituter.copy_cpool_bytes(cpool_bytes);
2707 if (reconstituter.get_error() != JVMTI_ERROR_NONE) {
2708 return reconstituter.get_error();
2709 }
2710
2711 constantPoolHandle constants(thread, ik->constants());
2712 *constant_pool_count_ptr = constants->length();
2713 *constant_pool_byte_count_ptr = cpool_size;
2714 *constant_pool_bytes_ptr = cpool_bytes;
2715
2716 return JVMTI_ERROR_NONE;
2717 } /* end GetConstantPool */
2718
2719
2720 // k_mirror - may be primitive, this must be checked
2721 // is_interface_ptr - pre-checked for NULL
2722 jvmtiError
2723 JvmtiEnv::IsInterface(oop k_mirror, jboolean* is_interface_ptr) {
2724 {
2725 bool result = false;
2726 if (!java_lang_Class::is_primitive(k_mirror)) {
2727 Klass* k = java_lang_Class::as_Klass(k_mirror);
2728 if (k != NULL && k->is_interface()) {
2729 result = true;
2730 }
2731 }
2732 *is_interface_ptr = result;
2733 }
2734
2735 return JVMTI_ERROR_NONE;
2736 } /* end IsInterface */
2737
2738
2739 // k_mirror - may be primitive, this must be checked
2740 // is_array_class_ptr - pre-checked for NULL
2741 jvmtiError
2742 JvmtiEnv::IsArrayClass(oop k_mirror, jboolean* is_array_class_ptr) {
2743 {
2744 bool result = false;
2745 if (!java_lang_Class::is_primitive(k_mirror)) {
2746 Klass* k = java_lang_Class::as_Klass(k_mirror);
2747 if (k != NULL && k->is_array_klass()) {
2748 result = true;
2749 }
2750 }
2751 *is_array_class_ptr = result;
2752 }
2753
2754 return JVMTI_ERROR_NONE;
2755 } /* end IsArrayClass */
2756
2757
2758 // k_mirror - may be primitive, this must be checked
2759 // classloader_ptr - pre-checked for NULL
2760 jvmtiError
2761 JvmtiEnv::GetClassLoader(oop k_mirror, jobject* classloader_ptr) {
2762 {
2763 if (java_lang_Class::is_primitive(k_mirror)) {
2764 *classloader_ptr = (jclass) jni_reference(Handle());
2765 return JVMTI_ERROR_NONE;
2766 }
2767 JavaThread* current_thread = JavaThread::current();
2768 HandleMark hm(current_thread);
2769 Klass* k = java_lang_Class::as_Klass(k_mirror);
2770 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2771
2772 oop result_oop = k->class_loader();
2773 if (result_oop == NULL) {
2774 *classloader_ptr = (jclass) jni_reference(Handle());
2775 return JVMTI_ERROR_NONE;
2776 }
2777 Handle result_handle = Handle(current_thread, result_oop);
2778 jclass result_jnihandle = (jclass) jni_reference(result_handle);
2779 *classloader_ptr = result_jnihandle;
2780 }
2781 return JVMTI_ERROR_NONE;
2782 } /* end GetClassLoader */
2783
2784
2785 // k_mirror - may be primitive, this must be checked
2786 // source_debug_extension_ptr - pre-checked for NULL
2787 jvmtiError
2788 JvmtiEnv::GetSourceDebugExtension(oop k_mirror, char** source_debug_extension_ptr) {
2789 {
2790 if (java_lang_Class::is_primitive(k_mirror)) {
2791 return JVMTI_ERROR_ABSENT_INFORMATION;
2792 }
2793 Klass* k = java_lang_Class::as_Klass(k_mirror);
2794 NULL_CHECK(k, JVMTI_ERROR_INVALID_CLASS);
2795 if (!k->is_instance_klass()) {
2796 return JVMTI_ERROR_ABSENT_INFORMATION;
2797 }
2798 const char* sde = InstanceKlass::cast(k)->source_debug_extension();
2799 NULL_CHECK(sde, JVMTI_ERROR_ABSENT_INFORMATION);
2800
2801 {
2802 *source_debug_extension_ptr = (char *) jvmtiMalloc(strlen(sde)+1);
2803 strcpy(*source_debug_extension_ptr, sde);
2804 }
2805 }
2806
2807 return JVMTI_ERROR_NONE;
2808 } /* end GetSourceDebugExtension */
2809
2810 //
2811 // Object functions
2812 //
2813
2814 // hash_code_ptr - pre-checked for NULL
2815 jvmtiError
2816 JvmtiEnv::GetObjectHashCode(jobject object, jint* hash_code_ptr) {
2817 oop mirror = JNIHandles::resolve_external_guard(object);
2818 NULL_CHECK(mirror, JVMTI_ERROR_INVALID_OBJECT);
2819 NULL_CHECK(hash_code_ptr, JVMTI_ERROR_NULL_POINTER);
2820
2821 {
2822 jint result = (jint) mirror->identity_hash();
2823 *hash_code_ptr = result;
2824 }
2825 return JVMTI_ERROR_NONE;
2826 } /* end GetObjectHashCode */
2827
2828
2829 // info_ptr - pre-checked for NULL
2830 jvmtiError
2831 JvmtiEnv::GetObjectMonitorUsage(jobject object, jvmtiMonitorUsage* info_ptr) {
2832 JavaThread* calling_thread = JavaThread::current();
2833 jvmtiError err = get_object_monitor_usage(calling_thread, object, info_ptr);
2834 if (err == JVMTI_ERROR_THREAD_NOT_SUSPENDED) {
2835 // Some of the critical threads were not suspended. go to a safepoint and try again
2836 VM_GetObjectMonitorUsage op(this, calling_thread, object, info_ptr);
2837 VMThread::execute(&op);
2838 err = op.result();
2839 }
2840 return err;
2841 } /* end GetObjectMonitorUsage */
2842
2843
2844 //
2845 // Field functions
2846 //
2847
2848 // name_ptr - NULL is a valid value, must be checked
2849 // signature_ptr - NULL is a valid value, must be checked
2850 // generic_ptr - NULL is a valid value, must be checked
2851 jvmtiError
2852 JvmtiEnv::GetFieldName(fieldDescriptor* fdesc_ptr, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2853 JavaThread* current_thread = JavaThread::current();
2854 ResourceMark rm(current_thread);
2855 if (name_ptr == NULL) {
2856 // just don't return the name
2857 } else {
2858 const char* fieldName = fdesc_ptr->name()->as_C_string();
2859 *name_ptr = (char*) jvmtiMalloc(strlen(fieldName) + 1);
2860 if (*name_ptr == NULL)
2861 return JVMTI_ERROR_OUT_OF_MEMORY;
2862 strcpy(*name_ptr, fieldName);
2863 }
2864 if (signature_ptr== NULL) {
2865 // just don't return the signature
2866 } else {
2867 const char* fieldSignature = fdesc_ptr->signature()->as_C_string();
2868 *signature_ptr = (char*) jvmtiMalloc(strlen(fieldSignature) + 1);
2869 if (*signature_ptr == NULL)
2870 return JVMTI_ERROR_OUT_OF_MEMORY;
2871 strcpy(*signature_ptr, fieldSignature);
2872 }
2873 if (generic_ptr != NULL) {
2874 *generic_ptr = NULL;
2875 Symbol* soop = fdesc_ptr->generic_signature();
2876 if (soop != NULL) {
2877 const char* gen_sig = soop->as_C_string();
2878 if (gen_sig != NULL) {
2879 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2880 if (err != JVMTI_ERROR_NONE) {
2881 return err;
2882 }
2883 strcpy(*generic_ptr, gen_sig);
2884 }
2885 }
2886 }
2887 return JVMTI_ERROR_NONE;
2888 } /* end GetFieldName */
2889
2890
2891 // declaring_class_ptr - pre-checked for NULL
2892 jvmtiError
2893 JvmtiEnv::GetFieldDeclaringClass(fieldDescriptor* fdesc_ptr, jclass* declaring_class_ptr) {
2894
2895 *declaring_class_ptr = get_jni_class_non_null(fdesc_ptr->field_holder());
2896 return JVMTI_ERROR_NONE;
2897 } /* end GetFieldDeclaringClass */
2898
2899
2900 // modifiers_ptr - pre-checked for NULL
2901 jvmtiError
2902 JvmtiEnv::GetFieldModifiers(fieldDescriptor* fdesc_ptr, jint* modifiers_ptr) {
2903
2904 AccessFlags resultFlags = fdesc_ptr->access_flags();
2905 jint result = resultFlags.as_int();
2906 *modifiers_ptr = result;
2907
2908 return JVMTI_ERROR_NONE;
2909 } /* end GetFieldModifiers */
2910
2911
2912 // is_synthetic_ptr - pre-checked for NULL
2913 jvmtiError
2914 JvmtiEnv::IsFieldSynthetic(fieldDescriptor* fdesc_ptr, jboolean* is_synthetic_ptr) {
2915 *is_synthetic_ptr = fdesc_ptr->is_synthetic();
2916 return JVMTI_ERROR_NONE;
2917 } /* end IsFieldSynthetic */
2918
2919
2920 //
2921 // Method functions
2922 //
2923
2924 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2925 // name_ptr - NULL is a valid value, must be checked
2926 // signature_ptr - NULL is a valid value, must be checked
2927 // generic_ptr - NULL is a valid value, must be checked
2928 jvmtiError
2929 JvmtiEnv::GetMethodName(Method* method_oop, char** name_ptr, char** signature_ptr, char** generic_ptr) {
2930 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2931 JavaThread* current_thread = JavaThread::current();
2932
2933 ResourceMark rm(current_thread); // get the utf8 name and signature
2934 if (name_ptr == NULL) {
2935 // just don't return the name
2936 } else {
2937 const char* utf8_name = (const char *) method_oop->name()->as_utf8();
2938 *name_ptr = (char *) jvmtiMalloc(strlen(utf8_name)+1);
2939 strcpy(*name_ptr, utf8_name);
2940 }
2941 if (signature_ptr == NULL) {
2942 // just don't return the signature
2943 } else {
2944 const char* utf8_signature = (const char *) method_oop->signature()->as_utf8();
2945 *signature_ptr = (char *) jvmtiMalloc(strlen(utf8_signature) + 1);
2946 strcpy(*signature_ptr, utf8_signature);
2947 }
2948
2949 if (generic_ptr != NULL) {
2950 *generic_ptr = NULL;
2951 Symbol* soop = method_oop->generic_signature();
2952 if (soop != NULL) {
2953 const char* gen_sig = soop->as_C_string();
2954 if (gen_sig != NULL) {
2955 jvmtiError err = allocate(strlen(gen_sig) + 1, (unsigned char **)generic_ptr);
2956 if (err != JVMTI_ERROR_NONE) {
2957 return err;
2958 }
2959 strcpy(*generic_ptr, gen_sig);
2960 }
2961 }
2962 }
2963 return JVMTI_ERROR_NONE;
2964 } /* end GetMethodName */
2965
2966
2967 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2968 // declaring_class_ptr - pre-checked for NULL
2969 jvmtiError
2970 JvmtiEnv::GetMethodDeclaringClass(Method* method_oop, jclass* declaring_class_ptr) {
2971 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2972 (*declaring_class_ptr) = get_jni_class_non_null(method_oop->method_holder());
2973 return JVMTI_ERROR_NONE;
2974 } /* end GetMethodDeclaringClass */
2975
2976
2977 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2978 // modifiers_ptr - pre-checked for NULL
2979 jvmtiError
2980 JvmtiEnv::GetMethodModifiers(Method* method_oop, jint* modifiers_ptr) {
2981 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2982 (*modifiers_ptr) = method_oop->access_flags().as_int() & JVM_RECOGNIZED_METHOD_MODIFIERS;
2983 return JVMTI_ERROR_NONE;
2984 } /* end GetMethodModifiers */
2985
2986
2987 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2988 // max_ptr - pre-checked for NULL
2989 jvmtiError
2990 JvmtiEnv::GetMaxLocals(Method* method_oop, jint* max_ptr) {
2991 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
2992 // get max stack
2993 (*max_ptr) = method_oop->max_locals();
2994 return JVMTI_ERROR_NONE;
2995 } /* end GetMaxLocals */
2996
2997
2998 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
2999 // size_ptr - pre-checked for NULL
3000 jvmtiError
3001 JvmtiEnv::GetArgumentsSize(Method* method_oop, jint* size_ptr) {
3002 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3003 // get size of arguments
3004
3005 (*size_ptr) = method_oop->size_of_parameters();
3006 return JVMTI_ERROR_NONE;
3007 } /* end GetArgumentsSize */
3008
3009
3010 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3011 // entry_count_ptr - pre-checked for NULL
3012 // table_ptr - pre-checked for NULL
3013 jvmtiError
3014 JvmtiEnv::GetLineNumberTable(Method* method_oop, jint* entry_count_ptr, jvmtiLineNumberEntry** table_ptr) {
3015 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3016 if (!method_oop->has_linenumber_table()) {
3017 return (JVMTI_ERROR_ABSENT_INFORMATION);
3018 }
3019
3020 // The line number table is compressed so we don't know how big it is until decompressed.
3021 // Decompression is really fast so we just do it twice.
3022
3023 // Compute size of table
3024 jint num_entries = 0;
3025 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3026 while (stream.read_pair()) {
3027 num_entries++;
3028 }
3029 jvmtiLineNumberEntry *jvmti_table =
3030 (jvmtiLineNumberEntry *)jvmtiMalloc(num_entries * (sizeof(jvmtiLineNumberEntry)));
3031
3032 // Fill jvmti table
3033 if (num_entries > 0) {
3034 int index = 0;
3035 CompressedLineNumberReadStream stream(method_oop->compressed_linenumber_table());
3036 while (stream.read_pair()) {
3037 jvmti_table[index].start_location = (jlocation) stream.bci();
3038 jvmti_table[index].line_number = (jint) stream.line();
3039 index++;
3040 }
3041 assert(index == num_entries, "sanity check");
3042 }
3043
3044 // Set up results
3045 (*entry_count_ptr) = num_entries;
3046 (*table_ptr) = jvmti_table;
3047
3048 return JVMTI_ERROR_NONE;
3049 } /* end GetLineNumberTable */
3050
3051
3052 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3053 // start_location_ptr - pre-checked for NULL
3054 // end_location_ptr - pre-checked for NULL
3055 jvmtiError
3056 JvmtiEnv::GetMethodLocation(Method* method_oop, jlocation* start_location_ptr, jlocation* end_location_ptr) {
3057
3058 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3059 // get start and end location
3060 (*end_location_ptr) = (jlocation) (method_oop->code_size() - 1);
3061 if (method_oop->code_size() == 0) {
3062 // there is no code so there is no start location
3063 (*start_location_ptr) = (jlocation)(-1);
3064 } else {
3065 (*start_location_ptr) = (jlocation)(0);
3066 }
3067
3068 return JVMTI_ERROR_NONE;
3069 } /* end GetMethodLocation */
3070
3071
3072 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3073 // entry_count_ptr - pre-checked for NULL
3074 // table_ptr - pre-checked for NULL
3075 jvmtiError
3076 JvmtiEnv::GetLocalVariableTable(Method* method_oop, jint* entry_count_ptr, jvmtiLocalVariableEntry** table_ptr) {
3077
3078 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3079 JavaThread* current_thread = JavaThread::current();
3080
3081 // does the klass have any local variable information?
3082 InstanceKlass* ik = method_oop->method_holder();
3083 if (!ik->access_flags().has_localvariable_table()) {
3084 return (JVMTI_ERROR_ABSENT_INFORMATION);
3085 }
3086
3087 ConstantPool* constants = method_oop->constants();
3088 NULL_CHECK(constants, JVMTI_ERROR_ABSENT_INFORMATION);
3089
3090 // in the vm localvariable table representation, 6 consecutive elements in the table
3091 // represent a 6-tuple of shorts
3092 // [start_pc, length, name_index, descriptor_index, signature_index, index]
3093 jint num_entries = method_oop->localvariable_table_length();
3094 jvmtiLocalVariableEntry *jvmti_table = (jvmtiLocalVariableEntry *)
3095 jvmtiMalloc(num_entries * (sizeof(jvmtiLocalVariableEntry)));
3096
3097 if (num_entries > 0) {
3098 LocalVariableTableElement* table = method_oop->localvariable_table_start();
3099 for (int i = 0; i < num_entries; i++) {
3100 // get the 5 tuple information from the vm table
3101 jlocation start_location = (jlocation) table[i].start_bci;
3102 jint length = (jint) table[i].length;
3103 int name_index = (int) table[i].name_cp_index;
3104 int signature_index = (int) table[i].descriptor_cp_index;
3105 int generic_signature_index = (int) table[i].signature_cp_index;
3106 jint slot = (jint) table[i].slot;
3107
3108 // get utf8 name and signature
3109 char *name_buf = NULL;
3110 char *sig_buf = NULL;
3111 char *gen_sig_buf = NULL;
3112 {
3113 ResourceMark rm(current_thread);
3114
3115 const char *utf8_name = (const char *) constants->symbol_at(name_index)->as_utf8();
3116 name_buf = (char *) jvmtiMalloc(strlen(utf8_name)+1);
3117 strcpy(name_buf, utf8_name);
3118
3119 const char *utf8_signature = (const char *) constants->symbol_at(signature_index)->as_utf8();
3120 sig_buf = (char *) jvmtiMalloc(strlen(utf8_signature)+1);
3121 strcpy(sig_buf, utf8_signature);
3122
3123 if (generic_signature_index > 0) {
3124 const char *utf8_gen_sign = (const char *)
3125 constants->symbol_at(generic_signature_index)->as_utf8();
3126 gen_sig_buf = (char *) jvmtiMalloc(strlen(utf8_gen_sign)+1);
3127 strcpy(gen_sig_buf, utf8_gen_sign);
3128 }
3129 }
3130
3131 // fill in the jvmti local variable table
3132 jvmti_table[i].start_location = start_location;
3133 jvmti_table[i].length = length;
3134 jvmti_table[i].name = name_buf;
3135 jvmti_table[i].signature = sig_buf;
3136 jvmti_table[i].generic_signature = gen_sig_buf;
3137 jvmti_table[i].slot = slot;
3138 }
3139 }
3140
3141 // set results
3142 (*entry_count_ptr) = num_entries;
3143 (*table_ptr) = jvmti_table;
3144
3145 return JVMTI_ERROR_NONE;
3146 } /* end GetLocalVariableTable */
3147
3148
3149 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3150 // bytecode_count_ptr - pre-checked for NULL
3151 // bytecodes_ptr - pre-checked for NULL
3152 jvmtiError
3153 JvmtiEnv::GetBytecodes(Method* method_oop, jint* bytecode_count_ptr, unsigned char** bytecodes_ptr) {
3154 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3155
3156 HandleMark hm;
3157 methodHandle method(method_oop);
3158 jint size = (jint)method->code_size();
3159 jvmtiError err = allocate(size, bytecodes_ptr);
3160 if (err != JVMTI_ERROR_NONE) {
3161 return err;
3162 }
3163
3164 (*bytecode_count_ptr) = size;
3165 // get byte codes
3166 JvmtiClassFileReconstituter::copy_bytecodes(method, *bytecodes_ptr);
3167
3168 return JVMTI_ERROR_NONE;
3169 } /* end GetBytecodes */
3170
3171
3172 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3173 // is_native_ptr - pre-checked for NULL
3174 jvmtiError
3175 JvmtiEnv::IsMethodNative(Method* method_oop, jboolean* is_native_ptr) {
3176 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3177 (*is_native_ptr) = method_oop->is_native();
3178 return JVMTI_ERROR_NONE;
3179 } /* end IsMethodNative */
3180
3181
3182 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3183 // is_synthetic_ptr - pre-checked for NULL
3184 jvmtiError
3185 JvmtiEnv::IsMethodSynthetic(Method* method_oop, jboolean* is_synthetic_ptr) {
3186 NULL_CHECK(method_oop, JVMTI_ERROR_INVALID_METHODID);
3187 (*is_synthetic_ptr) = method_oop->is_synthetic();
3188 return JVMTI_ERROR_NONE;
3189 } /* end IsMethodSynthetic */
3190
3191
3192 // method_oop - pre-checked for validity, but may be NULL meaning obsolete method
3193 // is_obsolete_ptr - pre-checked for NULL
3194 jvmtiError
3195 JvmtiEnv::IsMethodObsolete(Method* method_oop, jboolean* is_obsolete_ptr) {
3196 if (use_version_1_0_semantics() &&
3197 get_capabilities()->can_redefine_classes == 0) {
3198 // This JvmtiEnv requested version 1.0 semantics and this function
3199 // requires the can_redefine_classes capability in version 1.0 so
3200 // we need to return an error here.
3201 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3202 }
3203
3204 if (method_oop == NULL || method_oop->is_obsolete()) {
3205 *is_obsolete_ptr = true;
3206 } else {
3207 *is_obsolete_ptr = false;
3208 }
3209 return JVMTI_ERROR_NONE;
3210 } /* end IsMethodObsolete */
3211
3212 //
3213 // Raw Monitor functions
3214 //
3215
3216 // name - pre-checked for NULL
3217 // monitor_ptr - pre-checked for NULL
3218 jvmtiError
3219 JvmtiEnv::CreateRawMonitor(const char* name, jrawMonitorID* monitor_ptr) {
3220 JvmtiRawMonitor* rmonitor = new JvmtiRawMonitor(name);
3221 NULL_CHECK(rmonitor, JVMTI_ERROR_OUT_OF_MEMORY);
3222
3223 *monitor_ptr = (jrawMonitorID)rmonitor;
3224
3225 return JVMTI_ERROR_NONE;
3226 } /* end CreateRawMonitor */
3227
3228
3229 // rmonitor - pre-checked for validity
3230 jvmtiError
3231 JvmtiEnv::DestroyRawMonitor(JvmtiRawMonitor * rmonitor) {
3232 if (Threads::number_of_threads() == 0) {
3233 // Remove this monitor from pending raw monitors list
3234 // if it has entered in onload or start phase.
3235 JvmtiPendingMonitors::destroy(rmonitor);
3236 } else {
3237 Thread* thread = Thread::current();
3238 if (rmonitor->is_entered(thread)) {
3239 // The caller owns this monitor which we are about to destroy.
3240 // We exit the underlying synchronization object so that the
3241 // "delete monitor" call below can work without an assertion
3242 // failure on systems that don't like destroying synchronization
3243 // objects that are locked.
3244 int r;
3245 intptr_t recursion = rmonitor->recursions();
3246 for (intptr_t i = 0; i <= recursion; i++) {
3247 r = rmonitor->raw_exit(thread);
3248 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3249 if (r != ObjectMonitor::OM_OK) { // robustness
3250 return JVMTI_ERROR_INTERNAL;
3251 }
3252 }
3253 }
3254 if (rmonitor->owner() != NULL) {
3255 // The caller is trying to destroy a monitor that is locked by
3256 // someone else. While this is not forbidden by the JVMTI
3257 // spec, it will cause an assertion failure on systems that don't
3258 // like destroying synchronization objects that are locked.
3259 // We indicate a problem with the error return (and leak the
3260 // monitor's memory).
3261 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3262 }
3263 }
3264
3265 delete rmonitor;
3266
3267 return JVMTI_ERROR_NONE;
3268 } /* end DestroyRawMonitor */
3269
3270
3271 // rmonitor - pre-checked for validity
3272 jvmtiError
3273 JvmtiEnv::RawMonitorEnter(JvmtiRawMonitor * rmonitor) {
3274 if (Threads::number_of_threads() == 0) {
3275 // No JavaThreads exist so ObjectMonitor enter cannot be
3276 // used, add this raw monitor to the pending list.
3277 // The pending monitors will be actually entered when
3278 // the VM is setup.
3279 // See transition_pending_raw_monitors in create_vm()
3280 // in thread.cpp.
3281 JvmtiPendingMonitors::enter(rmonitor);
3282 } else {
3283 int r = 0;
3284 Thread* thread = Thread::current();
3285
3286 if (thread->is_Java_thread()) {
3287 JavaThread* current_thread = (JavaThread*)thread;
3288
3289 #ifdef PROPER_TRANSITIONS
3290 // Not really unknown but ThreadInVMfromNative does more than we want
3291 ThreadInVMfromUnknown __tiv;
3292 {
3293 ThreadBlockInVM __tbivm(current_thread);
3294 r = rmonitor->raw_enter(current_thread);
3295 }
3296 #else
3297 /* Transition to thread_blocked without entering vm state */
3298 /* This is really evil. Normally you can't undo _thread_blocked */
3299 /* transitions like this because it would cause us to miss a */
3300 /* safepoint but since the thread was already in _thread_in_native */
3301 /* the thread is not leaving a safepoint safe state and it will */
3302 /* block when it tries to return from native. We can't safepoint */
3303 /* block in here because we could deadlock the vmthread. Blech. */
3304
3305 JavaThreadState state = current_thread->thread_state();
3306 assert(state == _thread_in_native, "Must be _thread_in_native");
3307 // frame should already be walkable since we are in native
3308 assert(!current_thread->has_last_Java_frame() ||
3309 current_thread->frame_anchor()->walkable(), "Must be walkable");
3310 current_thread->set_thread_state(_thread_blocked);
3311
3312 r = rmonitor->raw_enter(current_thread);
3313 // restore state, still at a safepoint safe state
3314 current_thread->set_thread_state(state);
3315
3316 #endif /* PROPER_TRANSITIONS */
3317 assert(r == ObjectMonitor::OM_OK, "raw_enter should have worked");
3318 } else {
3319 if (thread->is_Named_thread()) {
3320 r = rmonitor->raw_enter(thread);
3321 } else {
3322 ShouldNotReachHere();
3323 }
3324 }
3325
3326 if (r != ObjectMonitor::OM_OK) { // robustness
3327 return JVMTI_ERROR_INTERNAL;
3328 }
3329 }
3330 return JVMTI_ERROR_NONE;
3331 } /* end RawMonitorEnter */
3332
3333
3334 // rmonitor - pre-checked for validity
3335 jvmtiError
3336 JvmtiEnv::RawMonitorExit(JvmtiRawMonitor * rmonitor) {
3337 jvmtiError err = JVMTI_ERROR_NONE;
3338
3339 if (Threads::number_of_threads() == 0) {
3340 // No JavaThreads exist so just remove this monitor from the pending list.
3341 // Bool value from exit is false if rmonitor is not in the list.
3342 if (!JvmtiPendingMonitors::exit(rmonitor)) {
3343 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3344 }
3345 } else {
3346 int r = 0;
3347 Thread* thread = Thread::current();
3348
3349 if (thread->is_Java_thread()) {
3350 JavaThread* current_thread = (JavaThread*)thread;
3351 #ifdef PROPER_TRANSITIONS
3352 // Not really unknown but ThreadInVMfromNative does more than we want
3353 ThreadInVMfromUnknown __tiv;
3354 #endif /* PROPER_TRANSITIONS */
3355 r = rmonitor->raw_exit(current_thread);
3356 } else {
3357 if (thread->is_Named_thread()) {
3358 r = rmonitor->raw_exit(thread);
3359 } else {
3360 ShouldNotReachHere();
3361 }
3362 }
3363
3364 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3365 err = JVMTI_ERROR_NOT_MONITOR_OWNER;
3366 } else {
3367 assert(r == ObjectMonitor::OM_OK, "raw_exit should have worked");
3368 if (r != ObjectMonitor::OM_OK) { // robustness
3369 err = JVMTI_ERROR_INTERNAL;
3370 }
3371 }
3372 }
3373 return err;
3374 } /* end RawMonitorExit */
3375
3376
3377 // rmonitor - pre-checked for validity
3378 jvmtiError
3379 JvmtiEnv::RawMonitorWait(JvmtiRawMonitor * rmonitor, jlong millis) {
3380 int r = 0;
3381 Thread* thread = Thread::current();
3382
3383 if (thread->is_Java_thread()) {
3384 JavaThread* current_thread = (JavaThread*)thread;
3385 #ifdef PROPER_TRANSITIONS
3386 // Not really unknown but ThreadInVMfromNative does more than we want
3387 ThreadInVMfromUnknown __tiv;
3388 {
3389 ThreadBlockInVM __tbivm(current_thread);
3390 r = rmonitor->raw_wait(millis, true, current_thread);
3391 }
3392 #else
3393 /* Transition to thread_blocked without entering vm state */
3394 /* This is really evil. Normally you can't undo _thread_blocked */
3395 /* transitions like this because it would cause us to miss a */
3396 /* safepoint but since the thread was already in _thread_in_native */
3397 /* the thread is not leaving a safepoint safe state and it will */
3398 /* block when it tries to return from native. We can't safepoint */
3399 /* block in here because we could deadlock the vmthread. Blech. */
3400
3401 JavaThreadState state = current_thread->thread_state();
3402 assert(state == _thread_in_native, "Must be _thread_in_native");
3403 // frame should already be walkable since we are in native
3404 assert(!current_thread->has_last_Java_frame() ||
3405 current_thread->frame_anchor()->walkable(), "Must be walkable");
3406 current_thread->set_thread_state(_thread_blocked);
3407
3408 r = rmonitor->raw_wait(millis, true, current_thread);
3409 // restore state, still at a safepoint safe state
3410 current_thread->set_thread_state(state);
3411
3412 #endif /* PROPER_TRANSITIONS */
3413 } else {
3414 if (thread->is_Named_thread()) {
3415 r = rmonitor->raw_wait(millis, false, thread);
3416 } else {
3417 ShouldNotReachHere();
3418 }
3419 }
3420
3421 switch (r) {
3422 case ObjectMonitor::OM_INTERRUPTED:
3423 return JVMTI_ERROR_INTERRUPT;
3424 case ObjectMonitor::OM_ILLEGAL_MONITOR_STATE:
3425 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3426 }
3427 assert(r == ObjectMonitor::OM_OK, "raw_wait should have worked");
3428 if (r != ObjectMonitor::OM_OK) { // robustness
3429 return JVMTI_ERROR_INTERNAL;
3430 }
3431
3432 return JVMTI_ERROR_NONE;
3433 } /* end RawMonitorWait */
3434
3435
3436 // rmonitor - pre-checked for validity
3437 jvmtiError
3438 JvmtiEnv::RawMonitorNotify(JvmtiRawMonitor * rmonitor) {
3439 int r = 0;
3440 Thread* thread = Thread::current();
3441
3442 if (thread->is_Java_thread()) {
3443 JavaThread* current_thread = (JavaThread*)thread;
3444 // Not really unknown but ThreadInVMfromNative does more than we want
3445 ThreadInVMfromUnknown __tiv;
3446 r = rmonitor->raw_notify(current_thread);
3447 } else {
3448 if (thread->is_Named_thread()) {
3449 r = rmonitor->raw_notify(thread);
3450 } else {
3451 ShouldNotReachHere();
3452 }
3453 }
3454
3455 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3456 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3457 }
3458 assert(r == ObjectMonitor::OM_OK, "raw_notify should have worked");
3459 if (r != ObjectMonitor::OM_OK) { // robustness
3460 return JVMTI_ERROR_INTERNAL;
3461 }
3462
3463 return JVMTI_ERROR_NONE;
3464 } /* end RawMonitorNotify */
3465
3466
3467 // rmonitor - pre-checked for validity
3468 jvmtiError
3469 JvmtiEnv::RawMonitorNotifyAll(JvmtiRawMonitor * rmonitor) {
3470 int r = 0;
3471 Thread* thread = Thread::current();
3472
3473 if (thread->is_Java_thread()) {
3474 JavaThread* current_thread = (JavaThread*)thread;
3475 ThreadInVMfromUnknown __tiv;
3476 r = rmonitor->raw_notifyAll(current_thread);
3477 } else {
3478 if (thread->is_Named_thread()) {
3479 r = rmonitor->raw_notifyAll(thread);
3480 } else {
3481 ShouldNotReachHere();
3482 }
3483 }
3484
3485 if (r == ObjectMonitor::OM_ILLEGAL_MONITOR_STATE) {
3486 return JVMTI_ERROR_NOT_MONITOR_OWNER;
3487 }
3488 assert(r == ObjectMonitor::OM_OK, "raw_notifyAll should have worked");
3489 if (r != ObjectMonitor::OM_OK) { // robustness
3490 return JVMTI_ERROR_INTERNAL;
3491 }
3492
3493 return JVMTI_ERROR_NONE;
3494 } /* end RawMonitorNotifyAll */
3495
3496
3497 //
3498 // JNI Function Interception functions
3499 //
3500
3501
3502 // function_table - pre-checked for NULL
3503 jvmtiError
3504 JvmtiEnv::SetJNIFunctionTable(const jniNativeInterface* function_table) {
3505 // Copy jni function table at safepoint.
3506 VM_JNIFunctionTableCopier copier(function_table);
3507 VMThread::execute(&copier);
3508
3509 return JVMTI_ERROR_NONE;
3510 } /* end SetJNIFunctionTable */
3511
3512
3513 // function_table - pre-checked for NULL
3514 jvmtiError
3515 JvmtiEnv::GetJNIFunctionTable(jniNativeInterface** function_table) {
3516 *function_table=(jniNativeInterface*)jvmtiMalloc(sizeof(jniNativeInterface));
3517 if (*function_table == NULL)
3518 return JVMTI_ERROR_OUT_OF_MEMORY;
3519 memcpy(*function_table,(JavaThread::current())->get_jni_functions(),sizeof(jniNativeInterface));
3520 return JVMTI_ERROR_NONE;
3521 } /* end GetJNIFunctionTable */
3522
3523
3524 //
3525 // Event Management functions
3526 //
3527
3528 jvmtiError
3529 JvmtiEnv::GenerateEvents(jvmtiEvent event_type) {
3530 // can only generate two event types
3531 if (event_type != JVMTI_EVENT_COMPILED_METHOD_LOAD &&
3532 event_type != JVMTI_EVENT_DYNAMIC_CODE_GENERATED) {
3533 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3534 }
3535
3536 // for compiled_method_load events we must check that the environment
3537 // has the can_generate_compiled_method_load_events capability.
3538 if (event_type == JVMTI_EVENT_COMPILED_METHOD_LOAD) {
3539 if (get_capabilities()->can_generate_compiled_method_load_events == 0) {
3540 return JVMTI_ERROR_MUST_POSSESS_CAPABILITY;
3541 }
3542 return JvmtiCodeBlobEvents::generate_compiled_method_load_events(this);
3543 } else {
3544 return JvmtiCodeBlobEvents::generate_dynamic_code_events(this);
3545 }
3546
3547 } /* end GenerateEvents */
3548
3549
3550 //
3551 // Extension Mechanism functions
3552 //
3553
3554 // extension_count_ptr - pre-checked for NULL
3555 // extensions - pre-checked for NULL
3556 jvmtiError
3557 JvmtiEnv::GetExtensionFunctions(jint* extension_count_ptr, jvmtiExtensionFunctionInfo** extensions) {
3558 return JvmtiExtensions::get_functions(this, extension_count_ptr, extensions);
3559 } /* end GetExtensionFunctions */
3560
3561
3562 // extension_count_ptr - pre-checked for NULL
3563 // extensions - pre-checked for NULL
3564 jvmtiError
3565 JvmtiEnv::GetExtensionEvents(jint* extension_count_ptr, jvmtiExtensionEventInfo** extensions) {
3566 return JvmtiExtensions::get_events(this, extension_count_ptr, extensions);
3567 } /* end GetExtensionEvents */
3568
3569
3570 // callback - NULL is a valid value, must be checked
3571 jvmtiError
3572 JvmtiEnv::SetExtensionEventCallback(jint extension_event_index, jvmtiExtensionEvent callback) {
3573 return JvmtiExtensions::set_event_callback(this, extension_event_index, callback);
3574 } /* end SetExtensionEventCallback */
3575
3576 //
3577 // Timers functions
3578 //
3579
3580 // info_ptr - pre-checked for NULL
3581 jvmtiError
3582 JvmtiEnv::GetCurrentThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3583 os::current_thread_cpu_time_info(info_ptr);
3584 return JVMTI_ERROR_NONE;
3585 } /* end GetCurrentThreadCpuTimerInfo */
3586
3587
3588 // nanos_ptr - pre-checked for NULL
3589 jvmtiError
3590 JvmtiEnv::GetCurrentThreadCpuTime(jlong* nanos_ptr) {
3591 *nanos_ptr = os::current_thread_cpu_time();
3592 return JVMTI_ERROR_NONE;
3593 } /* end GetCurrentThreadCpuTime */
3594
3595
3596 // info_ptr - pre-checked for NULL
3597 jvmtiError
3598 JvmtiEnv::GetThreadCpuTimerInfo(jvmtiTimerInfo* info_ptr) {
3599 os::thread_cpu_time_info(info_ptr);
3600 return JVMTI_ERROR_NONE;
3601 } /* end GetThreadCpuTimerInfo */
3602
3603
3604 // Threads_lock NOT held, java_thread not protected by lock
3605 // java_thread - pre-checked
3606 // nanos_ptr - pre-checked for NULL
3607 jvmtiError
3608 JvmtiEnv::GetThreadCpuTime(JavaThread* java_thread, jlong* nanos_ptr) {
3609 *nanos_ptr = os::thread_cpu_time(java_thread);
3610 return JVMTI_ERROR_NONE;
3611 } /* end GetThreadCpuTime */
3612
3613
3614 // info_ptr - pre-checked for NULL
3615 jvmtiError
3616 JvmtiEnv::GetTimerInfo(jvmtiTimerInfo* info_ptr) {
3617 os::javaTimeNanos_info(info_ptr);
3618 return JVMTI_ERROR_NONE;
3619 } /* end GetTimerInfo */
3620
3621
3622 // nanos_ptr - pre-checked for NULL
3623 jvmtiError
3624 JvmtiEnv::GetTime(jlong* nanos_ptr) {
3625 *nanos_ptr = os::javaTimeNanos();
3626 return JVMTI_ERROR_NONE;
3627 } /* end GetTime */
3628
3629
3630 // processor_count_ptr - pre-checked for NULL
3631 jvmtiError
3632 JvmtiEnv::GetAvailableProcessors(jint* processor_count_ptr) {
3633 *processor_count_ptr = os::active_processor_count();
3634 return JVMTI_ERROR_NONE;
3635 } /* end GetAvailableProcessors */
3636
3637 jvmtiError
3638 JvmtiEnv::SetHeapSamplingInterval(jint sampling_interval) {
3639 if (sampling_interval < 0) {
3640 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
3641 }
3642 ThreadHeapSampler::set_sampling_interval(sampling_interval);
3643 return JVMTI_ERROR_NONE;
3644 } /* end SetHeapSamplingInterval */
3645
3646 //
3647 // System Properties functions
3648 //
3649
3650 // count_ptr - pre-checked for NULL
3651 // property_ptr - pre-checked for NULL
3652 jvmtiError
3653 JvmtiEnv::GetSystemProperties(jint* count_ptr, char*** property_ptr) {
3654 jvmtiError err = JVMTI_ERROR_NONE;
3655
3656 // Get the number of readable properties.
3657 *count_ptr = Arguments::PropertyList_readable_count(Arguments::system_properties());
3658
3659 // Allocate memory to hold the exact number of readable properties.
3660 err = allocate(*count_ptr * sizeof(char *), (unsigned char **)property_ptr);
3661 if (err != JVMTI_ERROR_NONE) {
3662 return err;
3663 }
3664 int readable_count = 0;
3665 // Loop through the system properties until all the readable properties are found.
3666 for (SystemProperty* p = Arguments::system_properties(); p != NULL && readable_count < *count_ptr; p = p->next()) {
3667 if (p->is_readable()) {
3668 const char *key = p->key();
3669 char **tmp_value = *property_ptr+readable_count;
3670 readable_count++;
3671 err = allocate((strlen(key)+1) * sizeof(char), (unsigned char**)tmp_value);
3672 if (err == JVMTI_ERROR_NONE) {
3673 strcpy(*tmp_value, key);
3674 } else {
3675 // clean up previously allocated memory.
3676 for (int j = 0; j < readable_count; j++) {
3677 Deallocate((unsigned char*)*property_ptr+j);
3678 }
3679 Deallocate((unsigned char*)property_ptr);
3680 break;
3681 }
3682 }
3683 }
3684 assert(err != JVMTI_ERROR_NONE || readable_count == *count_ptr, "Bad readable property count");
3685 return err;
3686 } /* end GetSystemProperties */
3687
3688
3689 // property - pre-checked for NULL
3690 // value_ptr - pre-checked for NULL
3691 jvmtiError
3692 JvmtiEnv::GetSystemProperty(const char* property, char** value_ptr) {
3693 jvmtiError err = JVMTI_ERROR_NONE;
3694 const char *value;
3695
3696 // Return JVMTI_ERROR_NOT_AVAILABLE if property is not readable or doesn't exist.
3697 value = Arguments::PropertyList_get_readable_value(Arguments::system_properties(), property);
3698 if (value == NULL) {
3699 err = JVMTI_ERROR_NOT_AVAILABLE;
3700 } else {
3701 err = allocate((strlen(value)+1) * sizeof(char), (unsigned char **)value_ptr);
3702 if (err == JVMTI_ERROR_NONE) {
3703 strcpy(*value_ptr, value);
3704 }
3705 }
3706 return err;
3707 } /* end GetSystemProperty */
3708
3709
3710 // property - pre-checked for NULL
3711 // value - NULL is a valid value, must be checked
3712 jvmtiError
3713 JvmtiEnv::SetSystemProperty(const char* property, const char* value_ptr) {
3714 jvmtiError err =JVMTI_ERROR_NOT_AVAILABLE;
3715
3716 for (SystemProperty* p = Arguments::system_properties(); p != NULL; p = p->next()) {
3717 if (strcmp(property, p->key()) == 0) {
3718 if (p->set_writeable_value(value_ptr)) {
3719 err = JVMTI_ERROR_NONE;
3720 }
3721 }
3722 }
3723 return err;
3724 } /* end SetSystemProperty */